The phrase "a time span to" is correct and usable in written English.
It can be used when referring to a specific duration or period leading up to a certain point or event.
Example: "We need to establish a time span to complete the project before the deadline."
Alternatives: "a duration until" or "a period leading to".
It is too short a time span to tell.
Three weeks is too short a time span to get a job, the high school student said.
While Chen et al. (2007) directly stack the monthly data sets of a time span to obtain the mean field before and after the earthquake, here we remove the seasonal variations and also the linear trends (before and after the earthquake, respectively) by time series fitting before the stacking.
Another idea would be to require specific issue polls to put questions into different forms, from different angles which should also be published, to be sure the question is not leading, and over enough of a time span to offer more than a momentary peek at opinion in response to breaking news.
Figures 1(g) and 1(h) illustrate ways to measure global neuronal activity over a time span to compare control and DA-depleted circuits.
Allocate a time span to each thing you've listed.
The conflict between the group and the individual, too short a time-span to really immerse in deep thinking and the vast amount of fragmented information are, however, central paradoxes of our era itself.
In some oases the form of this aid has ranged from technical assistance involving one or two advisers or specialists over a short time span to a project involving several advisers plus equipment working over a long period.
In human subjects, with suppression of melatonin, e.g., by light during the night as experienced by shiftworkers exposed over a prolonged time span to nightwork, an increase of breast cancer incidence has been reported [ 60].
Research in semi-arid regions needs a long time span to reduce the effect of seasonal variations, and coverage over a wide area to reduce the effect of local variations.
A decade was considered an appropriate time span to detect temporal changes, since the estimated generation time of the ringed seal is c. 11 years (estimated by Palo et al. [ 16] after Smith [ 32]).
