adverbial vs modifier

adverbial

noun
  • An adverbial word or phrase. 

adj
  • Of or relating to an adverb. 

modifier

noun
  • A word, phrase, or clause that limits or qualifies the sense of another word or phrase. 

  • One who, or that which, modifies. 

  • A keyword that qualifies the meaning of other code. 

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