especially vs in the main

especially

adv
  • In a special manner; specially. 

  • Used to place greater emphasis upon someone or something. 

  • Particularly; to a greater extent than is normal. 

in the main

prep
  • Principally; on the whole; for the most part. 

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