drums and fan

hello guys do any of you know how the drum and fan thing works?
I bouth a jvc 110u and have shot may be 16 types with it, but i let the camera at my partner's house, who happens to be doing the camera work for my project,
so i read on the drum it reads: 86H
Fan 136, i feel that my camera was use with out me knowing it, since i think 86 and 136 is way too much for 16 types.
any opinions?
thanks.
 
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