For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:D/openSUSE_Tumbleweed/devel:languages:D.repo
zypper refresh
zypper install avgtime
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:D/openSUSE_Factory_ARM/devel:languages:D.repo
zypper refresh
zypper install avgtime
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:D/16.0/devel:languages:D.repo
zypper refresh
zypper install avgtime