While reading this, I realized this whole concept of spending time together or apart is built around the fact that both examples have two people living together (grandparents in retirement and the female writer's situation).

This should have been tackled with one example of two people not living together, as couples who do live together spend enough time seeing each other whereas couples who have their own places do not and have to make time/schedule time to see each other. This "together/time apart" conversation is more essential in relationships were the two individuals are co-habitating a place because there needs boundaries set.

In relationships where the two partners do not live together, they are forced to discuss and arrange spend time together apart and that conversation easily becomes a topic of discussion. This article should have been further researched.