Which of the following actions caused a drop in keyword ranking?

[ETonnard]

Hello,

About 2 months ago we build a specific page arround the keyword 'kerstkaarten' (christmas cards in Dutch). It moved up to the first page (7th position), but last week we fell back to a +50 position.
The changes we made during the last week where minimal, and I really don't have an idea what may have caused the sudden drop in ranking. Maybe you can help?

Link: http://www.smartphoto.be/nl/belangrijke-momenten/kerst/kerstkaarten

Changes made:

-> I changed the keyword kerstkaarten on tim on the page to 'kerstkaartjes', because the Moz page grader said the keyword density was a bit too high.

-> We changed the top image on the page with a different promo. Title of the image changed from 'kerstkaarten-promo' to 'kerstkaarten-wenskaarten'

-> The date on a small legal text on the page changed

-> We got 2 backlinks from bloggers who've written an article about our christmas cards.

So no major changes in my opinion. Any ideas? Thanks a lot!

hz2DpJS

[MarieHaynes]

All we can do here is guess, but my guess is that you had a temporary "honeymoon boost" when you first launched the site.  Google will often rank a new page highly, see how users interact with it and then drop it down in the rankings after a few weeks.

I would imagine that that's a pretty competitive term, so to rank #7 for it would take a lot of authority!