Using MM in Finnish should be minutes.
However, if English NfKeywords are used, MM can be month or minutes.
This patch try to distinguish minute/month if minute was first detected.

Change-Id: I029f3f2a4d79cb4a9730f8c32147f14bedd8094c
Reviewed-on: https://gerrit.libreoffice.org/43633Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>