Measure how many times the particular page loads in a browser. Track when a visitor starts scrolling down the page. Track how much time it takes to start scrolling. Track when the visitor reached the bottom of the page and how long it took.Measure time between page loading and start reading (i.e. scrolling). Measure time between start reading and the bottom of the article. Measure time between start reading and the bottom of the page.
Use the generated shortcode as like [trackpage id=1] or in your php file
(Note: id may be changed) to track you page readers or viewers.