deed vs undertaking

deed

noun
  • An action or act; something that is done. 

  • A legal instrument that is executed under seal or before witnesses. 

  • A brave or noteworthy action; a feat or exploit. 

  • Action or fact, as opposed to rhetoric or deliberation. 

verb
  • To transfer real property by deed. 

undertaking

noun
  • The act of one who undertakes (in either sense). 

  • A promise or pledge; a guarantee. 

  • That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise. 

  • The business of an undertaker, or the management of funerals. 

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