13-Letter Words Matching ________K___S

There are 16 13-letter words that match ________K___S. 9 are common words, such as BLUESTOCKINGS and FREETHINKINGS. A rarer one is SAFECRACKINGS. In this set, I is the most frequent open letter (15 words). 5 words contain a doubled letter.

Full list 16

bluestockingsfreethinkingsheartsicknessloansharkingsmetalworkingsmultitaskingssleepwalkingsstockbrokingsswashbucklersblatherskitesgreensicknessantiblackismsgreenbackismsinterworkingsphrasemakingssafecrackings

About this list

Words
16 (9 common words)
Common example
bluestockings
Rare example
safecrackings
Doubled letters
5
Ending in S
16
Most frequent letter
I (15)

Questions

How many 13-letter words matching ________k___s are there?

16. 9 of them are common words.

What is a common example?

BLUESTOCKINGS is among the common words in this set.