You know what - I have not counted them yet, I mean the number of postcards per Beatle.
From my memory banks I guess John sent off about 50 % of them, followed by Paul (about 35 %) and George (about 15 %).
I'll get back to you on that !
P.S. Ha, so your quote is from "Help", yeah I thought so.
Like you, I do like those witty exchanges that pop up every once in a while in the movie.