loading vs payload

loading

noun
  • The process by which something is loaded. 

  • A weighting or bias. 

  • A load, especially in the engineering and electrical engineering senses of force exerted, or electrical current or power supplied. 

  • A hourly pay rate given to a casual employee which is higher than the equivalent full-time or part-time employee's rate, usually paid to compensate for a lack of benefits such as sick leave or annual leave. 

payload

noun
  • That part of a cargo that produces revenue. 

  • The actual data in a data stream. 

  • The total weight of passengers, crew, equipment, and cargo carried by an aircraft or spacecraft. 

  • That part of a rocket, missile, propelled stinger, or torpedo that is not concerned with propulsion or guidance, such as a warhead or satellite. 

  • The functional part of a computer virus or another type of malware program, rather than the part that spreads it. 

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