9-Letter Words Matching ____K_U__

There are 15 9-letter words that match ____K_U__. 6 are common words, such as BLACKOUTS and BREAKOUTS. A rarer one is TRUNKFULS. In this set, S is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 15

blackoutsbreakoutscheckoutsfreakoutsknockoutsstinkbugschockfullfrankfurttracksuitblackgumscheekfulsstickfulsstickoutstruckfulstrunkfuls

About this list

Words
15 (6 common words)
Common example
blackouts
Rare example
trunkfuls
Doubled letters
2
Ending in S
12
Most frequent letter
S (13)

Questions

How many 9-letter words matching ____k_u__ are there?

15. 6 of them are common words.

What is a common example?

BLACKOUTS is among the common words in this set.