She claimed to have a 'sixth sense' for knowing when someone was about to call her.
I'll be flying in on the 'sixth'. [=the sixth day of the month]
He got a base hit in the 'sixth'. [=the sixth inning]
(..) my satellite time. It's not gonna happen. We're funded for five missions. I think I can get congress to authorize a sixth. No. evac'd after sols. There's half a mission worth of supplies (..)2015 The Martian