Hello, I'm translating from English into Italian an article about politics. I found the expression "every forth voter" in the sentence "Be it in the latest elections or in the former GDR states mainly more than every forth voter supported this party."
I thought that it was a typo and the writer meant "fourth", since neither WordReference, Reverso Context or Linguee seems to have an example of this expression. However, on the internet, I found this article ( 24% Americans support amnesty for Edward Snowden ) where the expression is used like this "Every forth voter supports amnesty for former National Security Agency contractor Edward Snowden in exchange for the information he still has in his “archives”".
So my question is "Does this expression exists or it's just a typo? And either way what does it means?"
Thank you very much for your help

I thought that it was a typo and the writer meant "fourth", since neither WordReference, Reverso Context or Linguee seems to have an example of this expression. However, on the internet, I found this article ( 24% Americans support amnesty for Edward Snowden ) where the expression is used like this "Every forth voter supports amnesty for former National Security Agency contractor Edward Snowden in exchange for the information he still has in his “archives”".
So my question is "Does this expression exists or it's just a typo? And either way what does it means?"
Thank you very much for your help