The phrase 'multiple trips' is correct and usable in written English.
For example, "He had to take multiple trips to the store in order to complete his grocery list."
A one-year visa, good for multiple trips, is $50.
Do not combine multiple trips on one form.
We make multiple trips to the Prada outlet; after all, can one really have enough shoes?
It also buys multiple trips to illegal ultrasound clinics and female foeticide to order.
"We created our brands after multiple trips to Portland and New York" he says.
First responders made multiple trips to Washington to lobby leaders to pass the bill.
"It would take two years, and multiple trips to Italy," he said.
However, local support staff make multiple trips through the danger zone.
GPS tracks regularly comprised multiple trips made by the birds between deployment and retrieval.
The retired basketball player has made multiple trips to North Korea since 2013.
The Harlem Globetrotters visited in 2013; Dennis Rodman has made multiple trips.
