Grammar fix

flexible schedule

changeable timetable

A plan or timetable that can be easily changed to fit different needs or situations.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

My job allows me to have a flexible schedule, so I can start and finish work whenever I want.work
I prefer a flexible schedule because it helps me balance my studies and part-time job more easily.IELTS speaking

Pattern: flexible schedule (noun phrase); have/offer/need a flexible schedule

WrongI have a flexible schedule of work.

RightI have a flexible work schedule.

'Flexible work schedule' or just 'flexible schedule'.

Patternflexible schedule (noun phrase); have/offer/need a flexible schedule

Choose the version that sounds natural in speech.

Stiff The position offers an adaptable temporal framework.

Natural The job has a flexible schedule.

'Adaptable temporal framework' is jargon; 'flexible schedule' is the standard phrase.

Words that usually travel with it.

A 'fixed schedule' cannot be changed, while a 'flexible schedule' can be adjusted.