interfere vs intrude

interfere

verb
  • To get involved or involve oneself, causing disturbance. 

  • To sexually molest, especially of a child. 

  • (of waves) To be correlated with each other when overlapped or superposed. 

  • To strike one foot against the opposite foot or ankle in using the legs. 

intrude

verb
  • To thrust oneself in; to come or enter without invitation, permission, or welcome; to encroach; to trespass. 

  • To force in. 

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