1) when, whenever, as long as, as soon as
Part of Speech: particle
From G3753 and G302; whenever (implying hypothesis or more or less uncertainty); also causative (conjugationally) inasmuch as: - as long (soon) as, that, + till, when (-soever), while.
|c as often as||67.36|
|d as long as||67.139|
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ὅταν; click on the second column to search for that grammatical form of the root ὅταν; click on the third column to search for that word and grammatical form; click on the total to search for the root ὅταν.