The phrase "narrowed over time" is correct and usable in written English.
It can be used to describe a process where something has become more limited or specific as time has passed.
Example: "The options for the project have narrowed over time due to budget constraints."
Alternatives: "reduced over time" or "limited over time."
However, disparities appear to have narrowed over time.
While a persistent gap exists between Indigenous and non-Indigenous outcomes for these indicators, we hypothesized that this gap should have narrowed over time.
Although differences have narrowed over time [ 12- 14], rates for Hispanic women appear to have remained lower than those for other groups [ 15].
Discussions of how and why Mr. Obama's support narrowed over time have a Rashomon-like quality: different observers see very different truths.
In Italy, too, the gap between Italy's wealthy north and the lagging Mezzogiorno in the south has also narrowed over time, thanks in part to large fiscal transfers.National economic data have the effect of masking regional changes.
In addition, while the variety of knowledge concepts employed in their research was initially higher for the heterogeneous team, this gap narrowed over time.
The price gap would narrow over time as the poorer countries pulled themselves out of poverty.
He has been buying corporate bonds, like those of Deutsche Telekom, for the higher yields over Treasuries and because he expects that yield difference to narrow over time.
Jeffrey Cole, director of the Center for Communication Policy program at the University of California at Los Angeles, agreed that the gap in expertise between parents and their digital offspring will narrow over time as the first computer generation grows up.
In this case, the age gap created by the minimum-age rule should narrow over time as the former repeat a grade and turn into one of the oldest in their class.12 Similarly, the grade gap i.e., being at least a year behind where the rest of the cohort should be must narrow at the same rate.
This undue burden framework has maintained the abortion right originally declared in Roe v. Wade but also allowed it to narrow over time.
