Schedule E days rented

Sched E Line:   Days rented at fair market value.  Available for rent at fair market value or the day it was rented.  I have a condo in North Carolina that was available for rent thru a management company except for the 5 weeks I used it last year.  It rented 32 days.  How do I account for the days it was not used by me or rented to others even though it was available??