$ sudo apt-get update
$ sudo apt-get install hunspell-de-at-frami 

hunspell-de-at-frami is installed in your system.

Make ensure the hunspell-de-at-frami package were installed using the commands given below,

$ sudo dpkg-query -l | grep hunspell-de-at-frami *

You will get with hunspell-de-at-frami package name, version, architecture and description in a table

hunspell-de-at-frami package basic information: