further vs interfere

further

verb
  • To help forward; to assist. 

  • To encourage growth; to support progress or growth of something; to promote. 

adj
  • More distant; relatively distant. 

  • More, additional. 

adv
  • To a greater extent or degree. 

  • Beyond what is already stated or is already the case. 

  • Also; in addition; furthermore; moreover. 

  • Following on (from). 

  • To, at or over a greater distance in space, time or other extent. 

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. 

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