Use the term "here or there" to describe something that happens just occasionally, and not regularly. In today's lesson, you learned that Alzheimer's is not the same as normal ageing.
For example, it's normal for senior citizens to misplace their car keys or to forget the name of an acquaintance here or there. (That means, to forget their car keys sometimes, or to occasionally forget the name of an acquaintance.) That's different from frequently losing things or frequently being confused about who is around.
A mentor can offer career advice here or there. That means the mentor offers career advice occasionally--not all the time. Having sweets here or there isn't too bad for your health (as long as you don't eat too much).