toolbox vs toolkit

toolbox

noun
  • A set of skills or competences 

  • A set of pre-existing routines for use in writing new programs. 

  • Dumbass or idiot. 

  • A storage case for tools. 

toolkit

noun
  • A set of personal abilities, skills, or resources to draw on. 

  • A set of software tools or components. 

  • Instructions to organise a protest. 

  • A set of guidelines or instructions. 

  • A set of tools kept together, especially comprising all the tools suitable for some particular type of work. 

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