Maybe we shouldn't think of it as «time playing football,» but as two things: «number of interactions in a period of time» seems bulky and overly academic. (sbnation.com)
Ask the foster parent questions about the settling in period when the dog first came to their home. (austindog.org)
The scientists were able to look at precipitation observations from 1951 to 2011 and document these changes in extremes in the period from 1981 to 2011. (scientificamerican.com)