at ease vs indefinite

at ease

prep
  • Allowed to refrain from being in rigid formation. 

  • Free of anxiety; not stressed or tense. 

  • In a relaxed position with the feet apart rather than at attention. 

indefinite

noun
  • A word or phrase that designates an unspecified or unidentified person or thing or group of persons or things. 

adj
  • Undecided or uncertain. 

  • Being an integral without specified limits. 

  • Vague or unclear. 

  • Designating an unspecified or unidentified person or thing or group of persons or things 

  • Without limit; forever, or until further notice; not definite. 

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