Most efficiënt way to retrieve search volume for thousands of keyword

[CB0001]

Hi,

I'm trying to figure out how I can efficiently get search volumes for large quantities of keywords. Unfortunately Keyword Planner has reduced their limit of keywords:
"You entered too many keywords. Please limit the number of keywords to 1,000. You can also upload a file with up to 800 keywords."

Weirdly, the file upload's limit is now even lower than the normal limit. A 1000 keywords a time will be a real chore when you want to retrieve search volume for 50.000 keywords. I tried SEMrush, but it does not suffice due to the fact that a lot of keywords in my language (Dutch) are not in the database. I also looked into the Adwords API, but this does not yet seem to have any implementation in Google sheets?

Ideas are welcome!

[whipster]

Grepwords. Simple API, though poorly documented. Believe Moz products use it as a source too.

[randfish]

Yup - agree that Grepwords is the way to go here. http://grepwords.com/

Keyword Explorer supports only up to 500 keywords uploaded in a single list (and the keyword data is only for the US right now). Going piece by piece through AdWords is probably the only other path to take.

[CB0001]

Thanks for you answers, I'll definitely be checking out Grepwords. I also want to look into the Adwords API in combination with excel, because these does seem to have an implementation, although I can hardly find any clear information on this. I just want to be able to paste a list of keywords and retrieve the search volumes for my country automatically.