The phrase "a wide time span" is correct and usable in written English.
It can be used to describe a significant duration of time, often in contexts related to history, events, or timelines.
Example: "The research covers a wide time span, from the early 1900s to the present day."
Alternatives: "a broad time frame" or "an extensive period."
Offering comparative readings of a number of texts that are traditionally called allegories and that cover a wide time span, Maureen Quilligan formulates a vocabulary for talking about the distinctive generic elements they share.
First, data were obtained retrospectively from patients imaged over a wide time span, who were unclassified by body size and diagnostic query, thus preventing us from finding any correlation between these latter parameters and per-patient radiation exposure.
Various studies were carried out over a wide time span, with the oldest study dating as far back as 1985.
The broadening of the significant results to include other child health outcomes results from the inclusion of more countries, and also from a wider time span.
This covered a wide time-span before, during and after the period of the mold sensitization study; some of the allergy study patients were admitted and recruited during this time but they represented only a small (and random) proportion of the admissions studied for seasonality.
Meanwhile, the present research could be the starting point of new researches investigating the implementation of the higher order thinking strategies in a wider time-span beyond one semester, and with the participants from other majors and discipline, or motivate the researchers to investigate the explicit training of these strategies.
Possible explanations include the wide time spans between the above cited studies and the different medical cultures within the countries where the studies took place.
Although this study assessed patients on ART over a relatively wider time span than most prior work (9, 10, 21), the results are largely consistent with findings from similarly designed studies.
In summary, the data-analysis papers in this special issue provide us with current progress in the understanding of solar-terrestrial phenomena observed in the VarSITI interval and in the wider time span.
As illustrated in Fig. 4b, c, the highest coefficients obtained with the Morlet wavelet span a wide time length, i.e., longer than the actual length of the ELF wave.
This information is complemented by time-resolved NMR, fluorescence correlation spectroscopy, and steady-state absorbance and fluorescence measurements to provide a picture of chromophore ionization reactions spanning a wide time domain.
