irregular schedule

Translations
нерегулярный график
He has an irregular schedule at work, which makes planning difficult.
У него нерегулярный график на работе, что затрудняет планирование.
Definitions
A work or activity schedule that does not follow a consistent or predictable pattern, often varying in hours, days, or frequency.
Words
irregular

adjective
нерегулярный
schedule

noun
график