how to install cherrytree?

[kaye n <guikaye@gmail.com>]

Hello Friends!

Having trouble installing cherrytree app.

kaye@laptop:~$ sudo apt-get update
[sudo] password for kaye:
Hit:1 http://security.debian.org/debian-security buster/updates InRelease      
Hit:2 http://deb.debian.org/debian buster InRelease                            
Get:3 http://deb.debian.org/debian buster-updates InRelease [51.9 kB]          
Hit:4 https://download.virtualbox.org/virtualbox/debian buster InRelease  
Fetched 51.9 kB in 6s (8,526 B/s)                                              
Reading package lists... Done
kaye@laptop:~$ sudo apt-get install cherrytree
Reading package lists... Done
Building dependency tree      
Reading state information... Done
E: Unable to locate package cherrytree

thank you for your time!

by the way thank you for the calculator suggestions in my previous thread.