"Insensitivity" vs. "callousness": subtle shades of disregard

What is similar?

Both "insensitivity" and "callousness" describe a lack of concern or empathy towards others" feelings or situations. They are often used to describe behavior that fails to acknowledge or respond to the emotional needs of others.

What is different?

Insensitivity generally refers to a lack of awareness or consideration for others" feelings, and can be unintentional. Callousness implies a more deliberate disregard and an unfeeling nature; it can suggest an active disinterest or disdain for others" emotions.

Which one is more common?