at large vs in the main

at large

prep
  • In general; as a whole. 

  • Having an electorate across multiple districts. 

  • On the loose; roaming freely; not confined. 

in the main

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

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