15-Letter Words Matching ________H_C____

There are 21 15-letter words that match ________H_C____. 5 are common words, such as DEMOGRAPHICALLY and PHILOSOPHICALLY. A rarer one is POLYMORPHICALLY. In this set, I is the most frequent open letter (21 words). 20 words contain a doubled letter.

Full list 21

demographicallyphilosophicallytelegraphicallytopographicallytypographicallyautographicallycountercheckingholographicallyhomeopathicallyosteopathicallysynecdochicallyxerographicallyanacoluthicallyautotrophicallydiastrophicallygeostrophicallyideographicallylogographicallymetamorphicallyneuropathicallypolymorphically

About this list

Words
21 (5 common words)
Common example
demographically
Rare example
polymorphically
Doubled letters
20
Ending in S
0
Most frequent letter
I (21)

Questions

How many 15-letter words matching ________h_c____ are there?

21. 5 of them are common words.

What is a common example?

DEMOGRAPHICALLY is among the common words in this set.