downtime

down|time /d'aʊntaɪm/
1 [N-UNCOUNT]
In industry, downtime is the time during which machinery or equipment is not operating.
On the production line, downtime has been reduced from 55% to 26%.
2 [N-UNCOUNT]
In computing, downtime is time when a computer is not working.
3 [N-UNCOUNT]
Downtime is time when people are not working. (mainly AM)
Downtime in Hollywood can cost a lot of money.