What English word has the most in it?

This is a bit of a word puzzle! The answer depends on how you define "most".

Here are a few possibilities:

* "In" appears the most: The word "in" itself contains the letters "in" the most times.

* Longest word with "in": The word "in" is the longest word that contains the letters "in".

* Most appearances of "in": The word "inn" has the letters "in" appearing twice.

Let me know if you had a specific definition in mind!