involve vs polish

involve

verb
  • To complicate or make intricate. 

  • To take in; to gather in; to mingle, blend or merge. 

  • To cause or engage (someone or something) to participate or to become connected or implicated. 

  • To comprise or include; to have as a related part. 

  • To envelop, enfold, entangle. 

polish

verb
  • To refine; remove imperfections from. 

  • To refine; to wear off the rudeness, coarseness, or rusticity of; to make elegant and polite. 

  • To apply shoe polish to shoes. 

  • To become smooth, as from friction; to receive a gloss; to take a smooth and glossy surface. 

  • To shine; to make a surface very smooth or shiny by rubbing, cleaning, or grinding. 

noun
  • Refinement; cleanliness in performance or presentation. 

  • Cleanliness; smoothness, shininess. 

  • A substance used to polish. 

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