We have received accommodations during MX problems, when another ac will not be available until the following morning.
We were also offered accommodations during Hurricane Sandy, when we could not fly from FRA to JFK because JFK was closed. The airline kept us in an airport hotel in FRA for several days.
We were given accommodations at FRA during last year's LH strikes, when our TATL flight was cancelled.
We get stuck at FRA, in the same rather boring and oversized hotel a lot.