as if vs insofar as

as if

conj

  • As though; in a manner suggesting. 

  • In mimicry of. 

intj

  • Refers to something that the speaker deems highly unlikely. 

insofar as

conj

  • to the extent that 

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