15-Letter Words Matching ____I_____T____

There are 20 15-letter words that match ____I_____T____. 6 are common words, such as MULTIPLICATIONS and PLENIPOTENTIARY. A rarer one is SPECIALISATIONS. In this set, I is the most frequent open letter (20 words). 3 words contain a doubled letter.

Full list 20

multiplicationsplenipotentiarypredispositionssophisticationsspecializationstrivializationsinitializationssophisticatedlytergiversationsapolipoproteinsferrimagnetismsfibrinopeptidesfictionizationsmissionizationsnondisjunctionspantisocraticalpantisocratistsprecipitantnessrepristinationsspecialisations

About this list

Words
20 (6 common words)
Common example
multiplications
Rare example
specialisations
Doubled letters
3
Ending in S
17
Most frequent letter
I (20)

Questions

How many 15-letter words matching ____i_____t____ are there?

20. 6 of them are common words.

What is a common example?

MULTIPLICATIONS is among the common words in this set.