soothe vs spark up

soothe

verb
  • To restore to ease, comfort, or tranquility; relieve; calm; quiet; refresh. 

  • To smooth over; render less obnoxious. 

  • To calm or placate someone or some situation. 

  • To keep in good humour; wheedle; cajole; flatter. 

  • To ease or relieve pain or suffering. 

  • To temporise by assent, concession, flattery, or cajolery. 

  • To bring comfort or relief. 

  • To allay; assuage; mitigate; soften. 

spark up

verb
  • to rekindle 

  • To provide electrification. 

  • To initiate (a conversation, debate etc.) 

  • to make more exotic or fun 

  • To light up; light a cigarette or start smoking a pipe, bong, etc. 

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