sig·nif·i·cant - sufficiently great. P!nk (RCA) 360-385k SPS, 340-370k album (per HDD). So, let's put it into perspective. "Significant chunk" in this case, in my opinion, means around 50%. 50% of 400K is 200K. So, P!nk's 400K with a "significant chunk" is on par with Joanne's 200K without that "significant chunk". Thank you, Billboard, for that clarification.