Some explaination on preview

[MacBH928]

Hello,

My question might sound dumb but, I was doing a search for text in a pdf document in preview...this is an image of what I got

Now I understand that the text I am searching for only appears in the following pages, but what are the lines next to them?

I figured that they mean how often the text I am searching for appears in that page, but its not

for example page 42 above , has the word I am searching for appears just 1 time and it has a long set of lines
and page 81 which has just 1 line, the words appears in it 11 times!

so what are these set of lines next to the page numbers?

 

[miles01110]

Supposedly they're relevancy meters... but as you have found out they aren't particularly meaningful.