Checking some of my sites I see:

- values ranging vom 320 - 410 for a bunch of German speaking sites hosted in Europe

- and values of 221 and 240 for my two English speaking sites hosted in America (via firebase - on googles own infrastructure)

So if you are concerned with your crawl budget, I think you better focus on things like:

- On-site duplicate content

- Soft error pages

- and Low quality and spam content

Plus you could also get some high quality backlinks.

And please be aware that the crawl frequency does not directly influence your rankings. So, as long as your do not really have a big problem regarding your crawl budget, you may spend your time wiser if you focus on other metrics.

PS: You may already know the tools, but others could be interested:

If you want to optimize you sites performance in respect to SEO use the following tools:

https://developers.google.com/speed/pagespeed/insights/?hl=d...

The most important aspect is "Reduce server response time" - you have to pass this!

https://www.webpagetest.org/

Choose a server near you and aim for a Speed-Index of maximum 3000 - I personally target 1000, but depending on your influence regarding the website's frontend you will not be able to achieve this.