Water the plant when the soil feels dry and feed it 'monthly'. [=once every month]
The regional manager visits the office on a 'monthly' basis.
her 'monthly' salary [=the salary she receives every month]
(..) Oh, pumpkin, what's wrong? It's too embarrassing to talk about in front of the guys. - Know what I mean, girlfriend? - Oh, sweetie. Do you have your monthly shame? Do you wanna lie down in Elijah's room? Oh, I don't think that's gonna cut it. I probably need to go home, (..)2013 TvShow: Community Title: Cooperative Escapism in Familial Relations Season: 4 Episode 5