The phrase 'in free time' is correct and can be used in written English.
You can use it to refer to time that you have available for leisure activities. For example, "I like to read in my free time."
Europeans took it in free time.
Slow electric guitar fingerpicking, seemingly in free time.
In free time with new husband: We cook a lot.
"And what do you do in Free Time?" she asked.
This trend means many more active retirement years, which further adds to the huge increase in free time.
Mr. Duval played loudly, and Mr. Krall, in free time, kept pace with Mr. Taylor's hammering rhythms.
Children from low walkability neighborhoods were more likely to engage in free-time physical activity outside of school and to achieve recommended levels of moderate-to-vigorous physical activity than were children from high walkability neighborhoods.
The technical term, surprisingly, is "flow," which according to the researchers occurs when "people in free-time activities that did not seem to follow the utility-centered motivational theories of the time" experienced "intense engagement and enjoyment". So, is this a bad thing?
Space and equipment were structured and made available to play games in free-time during the school day.
Participation in organized physical activity was not related to gender or age, but boys were significantly more likely than girls to report having participated in free-time physical activity during the prior week (74.1% vs 80.5%) [ 10].
