In person and in-person are both correct, but they do different jobs. One is a phrase, and one describes a noun.
schedule
A while vs. awhile: what is the difference?
A while and awhile sound alike, but they work differently. Learn which one fits after a preposition and which one stands alone.
How geek changed from carnival act to enthusiast
“Geek” once referred to a carnival performer, later an odd person, and now often describes someone deeply enthusiastic.
Inversion After Negative Adverbials Exercise
C1 (Advanced)
Why ruthless contains the old word ruth
Ruthless preserves an older English noun, ruth, which meant pity or compassion. That older meaning explains the word clearly.

