perfective vs snug

perfective

adj
  • Of, or relative to, the perfect tense or perfective aspect. 

noun
  • a perfective verb form 

snug

adj
  • Satisfactory. 

  • Warm and comfortable; cosy. 

  • Close; concealed; not exposed to notice. 

  • Close-fitting. 

verb
  • To make secure or snug. 

  • To snuggle or nestle. 

  • To make smooth. 

noun
  • A small, comfortable back room in a pub. 

  • A lug. 

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