unix - breakdown of how many lines with number of character occurrences

Is there an inbuilt command to do this or has anyone had any luck with a script that does it?

I am looking to get counts of how many lines had how many occurrences of a specfic character. (sorted descending by the number of occurrences)

For example, with this sample file:

gkdjpgfdpgdp
 fdkj
 pgdppp
 ppp
 gfjkl
 

Suggested input (for the 'p' character)

bash/perl some_script_name "p" samplefile

Desired output:

occs     count
 4          1
 3          2
 0          2
 

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