be inefficient vs gum up

be inefficient

gum up

verb
  • To cause to be gooey or gummy, especially with the effect of obstructing the operation of some mechanism or process. 

  • To make non-functional; to interfere with or put into a state of disorder; to ruin. 

How often have the words be inefficient and gum up occurred in a corpus of books? (source: Google Ngram Viewer )