They look up slate in their index and see that it often occurs on the same page as roof, so they suggest this as a possible refinement of the search.
They saw the term in the index and suggested the word be a possible search.
They never saw the term pop up in their index.
The Ark of the Covenant was brought to rest at a cave in Jerusalem.
A secondary benefit is improved planning of storage and equipment.
The market is packed
People looking at movies at the theatre.
A woman plays harmonica at a beach luau.
Assuming Mr. Brown Julius wasn't even there...