modern-day vs ongoing

modern-day

adj
  • Current; of the present. 

  • Designating a present-day version of someone or something in history. 

ongoing

adj
  • Presently or currently happening; being in progress. 

  • Continuing, permanent, lasting. 

noun
  • Something that is going on; a happening. 

How often have the words modern-day and ongoing occurred in a corpus of books? (source: Google Ngram Viewer )