Googlebot crawling AJAX website not always uses _escaped_fragment_

[yohayg]

Hi,

I started to investigate googlebot crawl log of our website, and it appears that there is no 1:1 correlation between a crawled URL with escaped_fragment and without it.
My expectation is that each time that google crawls a URL, a minute or so after, it suppose to crawl the same URL using an escaped_fragment

For example:
Googlebot crawl log for https://my_web_site/some_slug

Results:
Googlebot crawled this URL 17 times in July:

http://i.imgur.com/sA141O0.jpg

Googlebot crawled this URL additional 3 crawls using the escaped_fragment:

http://i.imgur.com/sOQjyPU.jpg

Do you have any idea if this behavior is normal?

Thanks,

Yohay

sOQjyPU.jpg sA141O0.jpg