asleep on the job vs dilatory

asleep on the job

dilatory

adj
  • Slow or tardy. 

  • Intentionally delaying (someone or something), intended to cause delay, gain time, or defer decision. 

  • Relating to dilation; dilative. 

How often have the words asleep on the job and dilatory occurred in a corpus of books? (source: Google Ngram Viewer )