visitor profile/summary: show what visitor likes

[hpvd]

Would be great to have in vistor's Summary a summary of what the visitor likes:

1. list of pages visited repeatedly
   e.g. with number of repetition e.g. in brackets:
   /at-home/green-dogs.html [4]
   /outsite/white-cats.htm [2]

(see also #8912)

2. list of pages with most time spent on (sum of all visits)

e.g.

/in-town/red-horses.html [1234s]
/at-home/green-dogs.html [345s]
/outsite/white-cats.html [120s]

[hpvd]

to bring this one step further on should add also product view
see: visitor profile/summary: show what visitor likes in ecommerce #10517

[hpvd]

of course it would be good to gave this information accessible via API like other things in visitor summary
(see #12049)