$ sudo apt-get update
$ sudo apt-get install fcitx-chewing 

fcitx-chewing is installed in your system.

Make ensure the fcitx-chewing package were installed using the commands given below,

$ sudo dpkg-query -l | grep fcitx-chewing *

You will get with fcitx-chewing package name, version, architecture and description in a table

fcitx-chewing package basic information: