Thanks for the reply. I found the following section in the docs:
reading this section, esp. the one titled "Displaying frequency with range bucketing", I reailzed that the default range is "Single" which resulted in my profile view being spread across many many buckets, with very low frequency per range.
Once I switched to the "Range" mode, and entered a large enough range, the data got bucketed in the ranges, and I was able to view a more concise view of the data in a few range buckets, with sufficiently high frequency per range.