footprint vs stepping

footprint

noun
  • Profession or lifestyle. 

  • A polygon representing the shape of an item. 

  • The impression of the foot in a soft substance such as sand or snow. 

  • Availability of a satellite from the ground. 

  • The surface space occupied by a structure. 

  • The audit trail left by a crashed program. 

  • Space required by a piece of equipment. 

  • The ecological impact of a human activity, machine, etc. 

  • The amount of hard drive space required for a program. 

  • A company's geographic market presence. 

stepping

noun
  • The act of taking a step. 

  • A specific iteration of a model of central processing unit, often distinguished by the addition or removal of features compared to earlier examples of the same processor, or the presence, or lack thereof, of specific bugs. 

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