9-Letter Words Matching ___LF____

There are 17 9-letter words that match ___LF____. 7 are common words, such as BILLFOLDS and BULLFIGHT. A rarer one is WOOLFELLS. In this set, L is the most frequent open letter (16 words). 13 words contain a doubled letter.

Full list 17

billfoldsbullfightbullfinchbullfrogscoalfacessoulfullywillfullycoalfieldgallflieshellfireswailfullyfullfacesnailfoldsshelffulsshelfliketoilfullywoolfells

About this list

Words
17 (7 common words)
Common example
billfolds
Rare example
woolfells
Doubled letters
13
Ending in S
9
Most frequent letter
L (16)

Questions

How many 9-letter words matching ___lf____ are there?

17. 7 of them are common words.

What is a common example?

BILLFOLDS is among the common words in this set.