periodic; regular; routine
liner; regularly scheduled ship
irregular (schedule, service, etc.); indeterminate (length of time); staggered (payments)
periodic medical check-up (examination)
regular (periodic) examination
commuter pass; season ticket
term deposit; (fixed) time deposit
commuter pass container; holder for a season ticket
regularly scheduled game; regularly scheduled match
subscription (e.g. to a magazine)
periodic inspection; regular inspection
periodic check; periodic inspection; routine inspection
scheduled bus; fixed route bus
school seasonal (train and bus) ticket
periodic fee (esp. for employee travel); commuting expenses
regular (annual) pay raise
fixed task; scheduled task
commutation ticket; season ticket
commuter pass; season ticket