15-Letter Words Matching _____E____C____

There are 16 15-letter words that match _____E____C____. 2 are common words, such as PROBLEMATICALLY and PSYCHEDELICALLY. A rarer one is PYROTECHNICALLY. In this set, I is the most frequent open letter (14 words). 9 words contain a doubled letter.

Full list 16

problematicallypsychedelicallycountercheckingcountermarchinghamamelidaceousontogeneticallypantheisticallycounterblockadecounterpuncherscounterpunchingcounterreactioncytogeneticallycytogeneticistsnonspecificallyparageneticallypyrotechnically

About this list

Words
16 (2 common words)
Common example
problematically
Rare example
pyrotechnically
Doubled letters
9
Ending in S
3
Most frequent letter
I (14)

Questions

How many 15-letter words matching _____e____c____ are there?

16. 2 of them are common words.

What is a common example?

PROBLEMATICALLY is among the common words in this set.