development vs headway

development

noun
  • The active placement of the pieces, or the process of achieving it. 

  • The process of developing; growth, directed change. 

  • A project consisting of one or more commercial or residential buildings. 

  • The expression of a function in the form of a series. 

  • The building of such a project. 

  • Something which has developed. 

  • The application of new ideas to practical problems (cf. research). 

  • The process by in which previous material is transformed and restated. 

  • The second section of a piece of music in sonata form, in which the original theme is revisited in altered and varying form. 

  • The process by which a mature multicellular organism or part of an organism is produced by the addition of new cells. 

headway

noun
  • Progress toward a goal. 

  • The interval of time or distance between the fronts of two vehicles (e.g. buses) moving in succession in the same direction, especially along the same pre-determined route. 

  • Movement ahead or forward. 

  • Forward motion, or its rate. 

  • A cross-heading. 

  • The clearance beneath an object, such as an arch, ceiling or bridge; headroom. 

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