downmarket vs not up to much

downmarket

adj
  • Designed for low-income consumers. 

  • Of, or relating to the less prestigious sector of the market. 

adv
  • Towards the less prestigious sector of the market. 

verb
  • To make or become downmarket. 

not up to much

How often have the words downmarket and not up to much occurred in a corpus of books? (source: Google Ngram Viewer )