14-Letter Words Matching _________RS___

There are 18 14-letter words that match _________RS___. 5 are common words, such as AMBASSADORSHIP and CHANCELLORSHIP. A rarer one is SEROCONVERSION. In this set, I is the most frequent open letter (17 words). 4 words contain a doubled letter.

Full list 18

ambassadorshipchancellorshipcouncilpersonsproprietorshipweatherpersonscontrollershipheadmastershipinstructorshipanticensorshipantisubversionantisubversiveantiuniversitycochairpersonscouncillorshiplegislatorshippolydispersitypostmastershipseroconversion

About this list

Words
18 (5 common words)
Common example
ambassadorship
Rare example
seroconversion
Doubled letters
4
Ending in S
3
Most frequent letter
I (17)

Questions

How many 14-letter words matching _________rs___ are there?

18. 5 of them are common words.

What is a common example?

AMBASSADORSHIP is among the common words in this set.