later vs thenceforwards

later

adv
  • At some unspecified time in the future. 

  • Afterward in time (used with than when comparing with another time). 

adj
  • At some time in the future. 

  • Coming afterward in distance (following an antecedent distance as embedded within an adverbial phrase) 

  • Coming afterward in time (used with than when comparing with another time). 

intj
  • See you later; goodbye. 

thenceforwards

adv
  • From then on; from that time on 

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