convenient vs on the debit side

convenient

adj
  • Suspicious due to suiting someone's purposes very well. 

  • Serving to reduce a difficulty, or accessible with minimum difficulty; expedient. 

on the debit side

prep
  • Used when mentioning the things that one does not like about something. 

How often have the words convenient and on the debit side occurred in a corpus of books? (source: Google Ngram Viewer )