The word cohort has appeared in 258 New York Times articles in the past year, including on Sept. 10 in "Choices Give New Meaning to 'Home, Sweet Home'" by Fran Hawthorne:

• Increasingly, machines can keep electronic tabs on people at home, and the elderly apparently are not bothered by the idea. A 2011 AARP study predicted that around one-fourth to almost one-half of those over age 65 "may be willing to use" electronic devices that remind them to take medicine, check blood pressure or alert caregivers if they are not following their normal routines.
• "The cohorts who are moving into their 60s and 70s are used to smartphones and Skype," said Melissa Hardy, a professor of sociology and demography at Pennsylvania State University.