IPA: /nɒnˈʃɛdʒuːld/
KK: /nɑnˈskɛdʒʊld/
Describing something that does not follow a regular timetable or schedule, often used in the context of transportation or services that operate at irregular times.
The nonscheduled flights allowed passengers to travel at their convenience without being tied to fixed departure times.
Nonscheduled → It is formed from "non-" (meaning not) and "scheduled" (from Old French *eschelon*, meaning a plan or arrangement). The word "nonscheduled" means not arranged or planned in advance.
Think of 'not' ('non-') and something that is 'planned' ('scheduled') — that's why nonscheduled means something that is not planned.