Crawl Rate for Lower Page Authority Websites

[Thumbtack]

Hi,At thumbtack.com we get tons of links from low (or no) page authority websites, and I'm wondering what the crawl rate of those links looks like.  I know Google pulls in the web at an astonishing rate, but I'd imagine they aren't re-crawling lower PA very frequently.Are they discovering these links a week after they're posted?  A month?  More?  I spent a while looking around for histograms of actual crawl rates and found surprisingly little.  I'd love to see average crawl rate by Domain or Page Authority if that exists anywhere.
Thanks!-MichaelP.S.  Here are some random examples of the types of pages with inbound links I'm talking about.  Normally we wouldn't spend too much time thinking about these, but there's just so many of them we can't ignore it!- http://www.majestic-cleaners.webs.com/- http://domchieraphotography.blogspot.com/- http://charlottepiano.musicteachershelper.com/- http://pin-upgirlphotography.vpweb.com/default.html- http://jfaithful.weebly.com/

[RyanKent]

I have a site that is 4 months old. Prior to today the site had a domain authority of 0, and the home page had a PA of 1. I submitted a daily sitemap and the site was crawled daily. If I ever shared an important article I would submit an extra site map and noticed the content in the search results within a couple hours. This is an active, forum based site.

I have heard others complain their site is crawled very infrequently. I am not sure if Google treated my site well because it was newer, or had good content, or decent activity. I can just share my experience that the site was crawled quite frequently.

Just checking the first site, it has only a few pages. It was designed by a basic site creation software and seems crawlable. Just small sites (around 10 pages) don't change frequently so they don't get crawled often. If the site owner doesn't submit a sitemap letting Google know a change has been made, it may be some time before Google decides to crawl them or finds a link to their site.