ergo vs therefrom

ergo

adv
  • Consequently, therefore, or thus. 

conj
  • therefore (especially in syllogisms) 

noun
  • An ergonomic factor or characteristic. 

therefrom

adv
  • From that; from him, her, or it. 

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