"allowed ample time for" is a perfectly correct and usable phrase in written English.
You can use it when there is a need for a sufficient amount of time to be available in order to complete some task or activity. For example, "The boss allowed ample time for us to finish the project."
Sinecures in obscure wings of the elaborate ruling apparatus allowed ample time for other pursuits, from the frivolous to the profound.
Each session allowed ample time for discussions, with enthusiastic participation from the floor.
"That's the ultimate thing is it's what's best for the kids," said Sardarbegian, who thought that having to balance a law career with being a basketball coach simply would not have allowed ample time for the latter.
In contrast to Diefenbaker's whistle-stop train touring, with a hasty speech in each town as the train passed through, the Liberals allowed ample time for "Uncle Louis" to shake hands with voters, pat their children on the head, and kiss their babies.
This transfer occurred within 3 hours after unilateral PER conditioning [35]; in our case no bilateral transfer occurred although we allowed ample time for it (18 hours).
The morphological distinctiveness of E. tridentifera prompted Sweet [ 22] to suggest that these caves are among the oldest in the plateau region, which would have allowed ample time for the evolution of cave-associated features.
A detailed schedule for each immersion week will be sent in advance, to allow ample time for making travel arrangements.
Reading assignments are limited in order to allow ample time for discussion and for personal attention to student writing.
Mr. Tung said this evening that he would allow ample time for public discussion of constitutional reforms over the next several years.
