15-Letter Words Matching __________A__I_

There are 13 15-letter words that match __________A__I_. 3 are common words, such as CINEMATOGRAPHIC and INTERSCHOLASTIC. A rarer one is PHYTOGEOGRAPHIC. In this set, H is the most frequent open letter (12 words). 1 words contain a doubled letter.

Full list 13

cinematographicinterscholasticwhatchamacallitantiperistalsischromatographichistoriographicphenolphthaleinpseudepigraphicachondroplasticencephalopathicnonphotographicpaleogeographicphytogeographic

About this list

Words
13 (3 common words)
Common example
cinematographic
Rare example
phytogeographic
Doubled letters
1
Ending in S
1
Most frequent letter
H (12)

Questions

How many 15-letter words matching __________a__i_ are there?

13. 3 of them are common words.

What is a common example?

CINEMATOGRAPHIC is among the common words in this set.