Many are fixated with the term "accordion fleet", which I didn't invent. I merely read it in a newspaper article. Maybe you should write a letter to the editor to straighten him out.
At the risk of digressing, a bit of Googling would suggest that the term was coined a year or so ago by Jean-Marc Eustache, CEO of the Air Transat group, at last year's AGM where he referred to "double-accordion” fleet size variability, meaning varying the relative numbers of narrow- and wide-body aircraft in the fleet between winter and summer by means of aircraft swaps with CanJet Airlines and XL Airways.
If the term was in use prior to that, I haven't found any record of it.