frequent meals .... is it good plan ?

In itself eating 5-6 small meals a day will make no difference at all if calories are not controlled. If calories are controlled a person will do just a well on any number of meals during the day unless they have some metabolic problems like diabetes. Basically that means it comes down to personal preference. I prefer 2-3 meals a day. When I eat 5-6 I am always hungry and never satisfied with my meals. Others find 5-6 meals helpful. Do what works for you to keep you eating at a moderate caloric deficit. Here is an excellent post on the research concerning meal frequency. http://www.myfitnesspal.com/topics/show/529002-a-compliation-on-meal-frequency

In all honestly, as long as you stay within your calorie goal you will lose weight.. no matter when you eat them. 4-6 meals a day does not boost metabolism like a lot of people like to tout it does.

Personally, I'm not hungry this morning.. so am I going to eat breakfast? No, prob not. I will however, eat a bigger lunch and dinner and maybe have a snack before bed.

It works for me because that's how often I'm hungry, I'm a grazer. Other people don't like to eat that frequently and therefore it isn't a good plan for them. Basically, eating a million little meals a day to boost metabolism is old school broscience and a load of crap, it basically boild down to caloric intake versus bmr (or tdee), along with eating for your body's needs.

at lunch i eat 2 piece of chicken breast with salad or vege

so i thought i will eat one piece at 3 p.m and the other at 6 p.m with ofcouers some vege

is there any different or it is the same ?

Again, it makes no difference when you eat it unless that's how frequently you are hungry. I'm a binge eater, so when I get hungry I get mean and make poor decisions. I have to plan out my meals for the day and eat pretty close to schedule to control my consumption. I find myself hungry every 2 hours and raving mad if I don't eat within every 4.

That being said if I eat 250 for breakfast and 100 for 10:30 snack that's 350 calories in 2 of my "meals." My body uses that same 350 calories as a person who eats a 350 calorie breakfast. Again, it all boils down to calories in and calories out, not timing.

I don't know about losing more weight with eating 5 small meals, but I have heard that it regulates insulin levels and helps prevent overeating if you eat something about every 2-3 hours.

I do intermittent fasting with an eating window so me, I don't graze. I eat one or two large meals a day depending on the day. I do eat my calories, but I'm satisfied with a few big meals as opposed to many small ones. Maybe someone else can't choke down a big meal and prefers to just nibble here and there. You need to do what makes sense for you.

I think it's mostly hunger management. I can't go 6 hours between meals, so I make 5 smaller meals. I still have the 3 larger meals, breakfast, lunch, and dinner, but a little smaller portions so I can have a bigger snack in between. It doesn't make any difference in how much weight you will lose, just keeps your head in a better place if you get hungry easily.

For me personally, I feel better and lose more when I eat 4-5 smaller meals a day. Like some of the other posters have said, if you plan your snacks, instead of grabbing something when you are hungry, you make better choices.