good time to make a profit; most profitable season; peak time
Refers to a period when one can earn a lot of money, often used for seasonal businesses or peak earning opportunities.
The end of the year is a profitable time for restaurants.
Summer vacation is the peak season for tourist spots.
Compound of 稼ぎ (kasegi, 'earning') + 時 (doki, 'time'). The reading どき is a rendaku form of 時 (toki).