9-Letter Words Matching _H_F_____

There are 14 9-letter words that match _H_F_____. 5 are common words, such as CHAFFINCH and SHIFTIEST. A rarer one is WHIFFLING. In this set, I is the most frequent open letter (11 words). 10 words contain a doubled letter.

Full list 14

chaffinchshiftiestshiftlessshufflersshufflingchafferedchaffererchaffiestshiftingschuffiestshaftingsshiftablewhifflerswhiffling

About this list

Words
14 (5 common words)
Common example
chaffinch
Rare example
whiffling
Doubled letters
10
Ending in S
5
Most frequent letter
I (11)

Questions

How many 9-letter words matching _h_f_____ are there?

14. 5 of them are common words.

What is a common example?

CHAFFINCH is among the common words in this set.