Meaning of "length", "size", and "count"

[Jakub Łukasiewicz]

On 2024-10-09 20:48 CEST, Alejandro Colomar <a...@kernel.org> wrote:
countof() is a new term, so it doesn't yet have a meaning (except 
as given by the attribute), but it naturally fits more with number 
of elements.

How would you call, for example, a function that returns how many 
times a value is contained in a data structure (be it array, linked 
list, or any other)?

~ J.Ł.