I should have been more clear. When in Contacts Folder, and you click
FIND up in the command menu, a quick-search bar appears at the top of
the contacts with two dialog boxes -- "Look for," and "Search In."

In the "Look for" box I enter a word to find. In the "Search In" box,
I choose CONTACTS.

My question is about the failing effectiveness of using this avenue to
find specific text written in various contact entries, rather than
using the avenue of "Options," "Advanced Find" and "frequently used
text fields."

I realize the more involved avenue works, but is there a reason why the
first, most convenient, option is only working intermittently?

Thanks,