Too many to count but let's see.. I say thank you before and after meals (which is about 6 times right there.) I say thank you when me and my Mama go shopping and she buys me something which I guess would make it about 2 times a week. I say thank when the custodian or busboy picks up my trash at a restaurant or at school. I say thank you when people compliment me.
I'll just cut this short now and say, about 10 times a day or more.