12-Letter Words Matching _______L_G__

There are 19 12-letter words that match _______L_G__. 5 are common words, such as ARCHIPELAGOS and METEOROLOGIC. A rarer one is VOLCANOLOGIC. In this set, I is the most frequent open letter (18 words). 2 words contain a doubled letter.

Full list 19

archipelagosmeteorologicquadriplegiaquadriplegicunprivilegedarchaeologicarchipelagicbathypelagicclimatologicfeatherlightgerontologicherpetologicichthyologicornithologicdermatologicmiscatalogedpostcollegesvexillologicvolcanologic

About this list

Words
19 (5 common words)
Common example
archipelagos
Rare example
volcanologic
Doubled letters
2
Ending in S
2
Most frequent letter
I (18)

Questions

How many 12-letter words matching _______l_g__ are there?

19. 5 of them are common words.

What is a common example?

ARCHIPELAGOS is among the common words in this set.