embroil vs encumber

embroil

verb
  • To draw into a situation; to cause to be involved. 

  • To implicate in confusion; to complicate; to jumble. 

encumber

verb
  • To burden with a legal claim or other obligation. 

  • To load down something with a burden. 

  • To restrict or block something with a hindrance or impediment. 

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