I wish to get like a list of all tags that appear in posts of a specific artist and would be even better if it have the number of times each tag appear.

example:

Artist: "Atryl"
lets say atryl had only 2 posts.

post_1: {id: 0001, tags: "mammal, male, cum, after_sex"}
post_2: {id: 0001, tags: "mammal, female, after_sex, pussy"}

then I want get back a array, object or even a string with the tags and if possible how many times it appear, some thing like:

Atryl_tags: {mammal: 2, male: 1, female: 1, cum: 1, after_sex: 2, pussy: 1}