Series of small changes to test something

Is there a limit?

[albert]

During last weeks I've made small changes at some of my sites' pages to test what would give best ranking results (mainly stuff like order of KWs in title and H-tags). - All pages belong to sites that are indexed 7 months at least, doing very well for most targetted KWs. - But, you know, you always try to improve :)

After Esmeralda it was very nice: changes made, results up 3 days later if not earlier. And stable.

At a few pages of one of my sites it was a little tricky to find an order of KWs that ranked top and was user-friendly (= readable), too. So I changed those pages 4 times, according to achieved results.

Last change was wednesday last week. No changes in SERPs so far, still showing old title and snippet.

Spiders are coming by as before, maybe a little bit less.

Has G changed something?

Or is there a limit for those changes, concerning repeated small changes in a certain timeframe?

Or don't they work at the Plex during the weekend?

[Marcia]

I don't make changes that often so I haven't particularly noticed but the last fresh date I've seen is August 2nd.

I've got one new site that's barely just being put together that really shouldn't even be showing up in the index at all, much less ranking (which it is). There isn't one single inbound link to it. It's at my ISP and fairly new - ISP sites don't show fresh dates - and some changes I made several days ago showed right away, even a new design is cached.

What I'm wondering is that even if pages get fresh crawled, are new changes reflected in the serps each time, or is there a sequencing where a certain number are updated in the cache on some sort of a sequential or rotating basis.

[albert]

Changes from last wednesday were in the SERPs this morning. Fresh tags say Aug 02 - it wasn't to be seen yesterday evening (11 pm UTC+1), though.

So it seems that changes of my already indexed pages make it in the index in 2 to 5 days.

[added]Marcia: all I can say is every change I've made was reflected in SERPS.[/added]

[Marcia]

So we can safely say it's more than a day but less than a week.