10-Letter Words Matching ____FF____

There are 12 10-letter words that match ____FF____. 3 are common words, such as CHAUFFEURS and DISAFFECTS. A rarer one is UNMUFFLING. In this set, I is the most frequent open letter (10 words). 12 words contain a doubled letter.

Full list 12

chauffeursdisaffectsscruffiestinsufflateparaffinicsquiffiestsubofficerdisaffirmsparaffinedunbuffereduncoffinedunmuffling

About this list

Words
12 (3 common words)
Common example
chauffeurs
Rare example
unmuffling
Doubled letters
12
Ending in S
3
Most frequent letter
I (10)

Questions

How many 10-letter words matching ____ff____ are there?

12. 3 of them are common words.

What is a common example?

CHAUFFEURS is among the common words in this set.