embryonid vs larval

embryonid

adj
  • Synonym of embryonic 

larval

adj
  • Undeveloped, latent. 

  • Characteristic of larvae. 

  • Having the form or shape of a larva. 

  • Of or relating to a larva or larvae. 

  • Being a larva. 

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