DIY expert vs knockabout

DIY expert

knockabout

adj
  • Boisterous 

  • Suitable for rough use. 

noun
  • An act of playing a sport casually or informally. 

  • A worker habitually engaged in casual employment. 

  • A small sailboat lacking a bowsprit, of a type found primarily in the Massachusetts area. 

  • A person living in rough, violent conditions. 

  • A tumbler. 

  • A slapstick comedian or comedy. 

  • Clothing suitable for rough use. 

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