clipboard vs crock

clipboard

noun
  • A flat piece of rigid material, such as card or plastic, with a clip at one end under which papers can be held. 

  • A buffer in memory where the user can store data temporarily while transferring it from one place within an application to another or between applications. 

crock

noun
  • A stoneware or earthenware jar or storage container. 

  • Silly talk, a foolish belief, a poor excuse, nonsense. 

  • A piece of broken pottery, a shard. 

  • An old or broken-down vehicle (and formerly a horse or ewe). 

  • A patient who is difficult to treat, especially one who complains of a minor or imagined illness. 

  • A person who is physically limited by age, illness or injury. 

  • A low stool. 

  • The loose black particles collected from combustion, as on pots and kettles, or in a chimney; soot; smut. 

  • Colouring matter that rubs off from cloth. 

verb
  • To put or store (something) in a crock or pot. 

  • To cover the drain holes of a planter with stones or similar material, in order to ensure proper drainage. 

  • To give off crock or smut. 

  • To transfer coloring through abrasion from one item to another. 

  • To break something or injure someone. 

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