Reading the preceeding posts, it isn't possible to do a custom install with the later releases of Office. It will, nevertheless, install the whole lot, whatever you select. But, as Bighorn suggests, the easier solution is to find a spreadsheet on the web.
If you are short of space, and have a legit copy of Office, then another solution is to use it offline:
office.live.com
You will be required to sign in with the account email and password you normally use. After that, you can make a shortcut to you start menu or desktop.
In fact, the whole of the Office suite is available online, if that is your preference.