"longer time frame" is a valid phrase in written English.
You can use it when you need to describe an extended period of time. For example, "The research project requires a longer time frame to complete."
Europeans have a longer time frame than Americans.
"Research sometimes has a longer time frame," Goodell said in an interview.
"The (deficit) problem is a long-term problem and should be addressed over a longer time frame".
But in "Every Little Step" there are more stories in a longer time frame, not to mention musical numbers.
It is a tricky calculation, however, because that longer time frame for viewership is not used when charging advertisers.
The other show of Chinese textiles opening next week is even more ambitious because it covers a longer time frame, from the 11th through the 18th centuries.
Now I've decided to embark on the biggest challenge yet: taking the experiment further afield and over a much longer time frame.
But anyone with any grasp of Labour's predicament well knows that reinventing its politics will be a much more onerous business, spread over a longer time frame.
Another top official said the White House was confident that those who supported Mr. Obama's election would accept a somewhat longer time frame.
"If anything I would hope we would see a shorter time frame rather than a longer time frame," Russ Girling, TransCanada's chief executive, told reporters.
As with all models, a longer time frame allows more future uncertainties.
