Find installation date and time of rpm package(s).

List all rpm package with date and time information, use the below given command to list all rpm package with date-stamp information:

rpm -qa --last

–cut
iotop-0.4.3-7.8.1 Fri Aug 7 12:24:02 2015
libgtop-lang-2.28.0-1.9.24 Fri Aug 7 12:20:57 2015
libgtop-2.28.0-1.9.24 Fri Aug 7 12:20:10 2015
libgtop-2_0-7-2.28.0-1.9.24 Fri Aug 7 12:20:06 2015
–cut

and for a single package:

rpm -q --last package-name

Activate RPMFusion repo

The RPMFusion provides some free and non-free software for Fedora.

free – for Open Source Software (as defined by the Fedora Licensing Guidelines) which the Fedora project cannot ship due to other reasons

nonfree – for redistributable software that is not Open Source Software (as defined by the Fedora Licensing Guidelines); this includes software with publicly available source-code that has “no commercial use”-like restrictions

To enable access to just free repository use the following command:
root# dnf install http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm

To enable access to both the free and the nonfree repository use the following command:
root# dnf install http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm