modern vs obsolete

modern

adj
  • Pertaining to the modern period (c.1800 to contemporary times), particularly in academic historiography. 

  • Pertaining to a current or recent time and style; not ancient. 

noun
  • Someone who lives in modern times. 

obsolete

adj
  • No longer in use; gone into disuse; disused or neglected (often in favour of something newer). 

  • Imperfectly developed; not very distinct. 

verb
  • To cause to become obsolete. 

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