entangle vs throw a spanner in the works

entangle

verb
  • To involve in difficulties or embarrassments; to embarrass, puzzle, or distract by adverse or perplexing circumstances, interests, demands, etc.; to hamper; to bewilder. 

  • To ensnare. 

  • To tangle up; to twist or interweave in such a manner as not to be easily separated. 

  • To involve in such complications as to render extrication difficult. 

throw a spanner in the works

verb
  • To introduce a problem, dilemma or obstacle, something unexpected or troublesome. 

How often have the words entangle and throw a spanner in the works occurred in a corpus of books? (source: Google Ngram Viewer )