nonconsecutive

/ˌnɑnkənˈsɛkjətɪv/
adjective
  1. Not following one after another in order; not in a sequence.
    • He attended three nonconsecutive meetings over the course of the month.
    • She took two nonconsecutive days off, one on Monday and one on Friday.
    • The numbers 1, 3, and 5 are nonconsecutive because they skip 2 and 4.