Findings
From this view, it is clear that there has been an exponential growth from year to year on the subject of the discussion. It is noted especially the spike in the number of topics published during the year 2012, the year after the treaty ACTA and SOPA bill.
The topics of discussion are proportional to the number of events and laws that affect the world of file sharing over the years.
Countermeasures and high-profile cases of clousure (megavideo) generate pubblic discussion and stances. File sharing generates controversy only when big players (majors) decide to move against it.
From the dataset, It seems the comparison between words file sharing and piracy there isn’t any difference: the terms are not associated with a more positive or negative view.