12-Letter Words Matching S_________G_

There are 16 12-letter words that match S_________G_. 10 are common words, such as SAFEKEEPINGS and SCAFFOLDINGS. A rarer one is SUPERSTRINGS. In this set, I is the most frequent open letter (15 words). 8 words contain a doubled letter.

Full list 16

safekeepingsscaffoldingsshellackingsshopliftingsshortcomingssightseeingssoothsayingsstocktakingsstraightedgesurroundingsscuppernongssociobiologysailboatingssongwritingssteelmakingssuperstrings

About this list

Words
16 (10 common words)
Common example
safekeepings
Rare example
superstrings
Doubled letters
8
Ending in S
14
Most frequent letter
I (15)

Questions

How many 12-letter words matching s_________g_ are there?

16. 10 of them are common words.

What is a common example?

SAFEKEEPINGS is among the common words in this set.