modern-day vs nowaday

modern-day

adj
  • Current; of the present. 

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

nowaday

adj
  • Existing nowadays; current, present; contemporary. 

noun
  • The present period; contemporary times. 

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