The phrase "and time span of a" is not complete and lacks context, but it is grammatically correct and can be used in written English.
You can use it when discussing durations or periods related to a specific subject or event, typically in a more extensive sentence.
Example: "The study examined the effects of various factors on the time span of a project."
Alternatives: "and duration of a" or "and period of a".
The total dose and time span of administration did not play a role.
Data form medical records (eg. surgery, physiotherapy treatment, period and time span of ITW) were lacking.
POITermType is an abstract entity derived from POIBaseType and adds properties for the management of categorical descriptions (such as the ones seen in category), link, label, author, license and time properties of POIType; POIType is an abstract entity derived from POIBaseType and adds entities for describing, labeling, categorizing and indicating the time span of a POI or group of POI.
There's something downright Clintonian about her ability to communicate energy and empathy in the time span of a handshake -- as well as her gift for enlisting business and entertainment celebrities to her cause.
We allowed the occurrence of a mass extinction event along the entire time span of a tree and we set the survival probability of species to 0.1 (corresponding to 10% of the species surviving a mass extinction event).
Let τ denote the time span of a slot and assume that in a slot, a node can either transmit or receive only one packet, except for necessary control bits.
An obvious effect of an increased surface to volume ratio is a potential for build-up of periphyton biomass on the inside walls, which will act as an increasingly important factor for the flow of energy and material in the mesocosm during the time span of a study.
As shown in Figure 2, the resolution and time-span of some experimental data now approaches a sufficient level to allow reliable computation of the subleading features of the Fourier spectrum.
The battlefields of Waterloo and the Marne are separated by a physical distance of approximately 180 miles and by a time span of roughly a century.
Here, time spans of a few million up to tens of million years are probably involved.
