5-Letter Words Matching B_F__

There are 13 5-letter words that match B_F__. 4 are common words, such as BEFIT and BEFOG. A rarer one is BUFFY. In this set, F is the most frequent open letter (10 words). 10 words contain a doubled letter.

Full list 13

befitbefogboffobuffsbiffsbifidbuffobaffsbaffybiffyboffsbuffibuffy

About this list

Words
13 (4 common words)
Common example
befit
Rare example
buffy
Doubled letters
10
Ending in S
4
Most frequent letter
F (10)

Questions

How many 5-letter words matching b_f__ are there?

13. 4 of them are common words.

What is a common example?

BEFIT is among the common words in this set.