downmarket vs low-class

downmarket

adj

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

  • Designed for low-income consumers. 

adv

  • Towards the less prestigious sector of the market. 

verb

  • To make or become downmarket. 

low-class

adj

  • Lacking social rank or respectability. 

How often have the words downmarket and low-class occurred in a corpus of books? (source: Google Ngram Viewer )