How to set Google Analytics tracking code to track when text is revealed???

Hello,

I′m using the plugin in a widget to this play a Phone number in a spoiler. The users only sees the text “Telefono” and when he/she click the phone number is shown as you can see in this page

I need to set google analytics tracking code to get the number of time a specific phone number is shown. How can I do this?

If there is no option, I recommend the plugin to include statistics in the future!

Note: this is not the only page where I need to track this kind of event, I have a few hotel and restaurants microsites where I need to do the same.

Thanks for your help!

https://www.ads-software.com/plugins/shortcodes-ultimate/