us·ance 
(yzəns)
(yzəns)n.
1. The length of time, established by custom and varying between countries, that is allowed for payment of a foreign bill of exchange.
2. Use.
3. Usage; custom.
4. Interest paid on borrowed money.
[Middle English, usage, from Old French, probably from Vulgar Latin *ūsantia, from *ūsāns, *ūsant-, present participle of *ūsāre, frequentative of Latin ūtī.]