circumstantially vs fitfully

circumstantially

adv
  • in a circumstantial manner 

  • In respect to circumstances; not essentially; accidentally. 

  • In every circumstance or particular; minutely. 

fitfully

adv
  • In a fitful manner; irregularly or unsteadily. 

How often have the words circumstantially and fitfully occurred in a corpus of books? (source: Google Ngram Viewer )