modern-day vs synchronic

modern-day

adj
  • Current; of the present. 

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

synchronic

adj
  • Occurring at a specific point in time. 

  • Relating to the study of a language at only one point in its history. 

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