15-Letter Words Matching __S__F_________

There are 13 15-letter words that match __S__F_________. 7 are common words, such as DISAFFILIATIONS and DISENFRANCHISED. A rarer one is DISINFLATIONARY. In this set, I is the most frequent open letter (13 words). 5 words contain a doubled letter.

Full list 13

disaffiliationsdisenfranchiseddisenfranchisesdisinformationsinsufficienciesmisinformationsunselfishnessespassifloraceouspestiferousnessunselfconsciousdesulfurizationdisinfestationsdisinflationary

About this list

Words
13 (7 common words)
Common example
disaffiliations
Rare example
disinflationary
Doubled letters
5
Ending in S
10
Most frequent letter
I (13)

Questions

How many 15-letter words matching __s__f_________ are there?

13. 7 of them are common words.

What is a common example?

DISAFFILIATIONS is among the common words in this set.