business suit vs overcoat

business suit

noun
  • A plain, formal matching jacket and trousers (or skirt), as worn by office workers. 

overcoat

noun
  • A heavy garment worn over other clothes, for protection from cold or weather. 

verb
  • To apply an exterior coating to. 

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