B1
development and improvement of skills, knowledge, etc.
Dictionary examples:
The teacher praised my progress in not falling asleep during her lectures. (0.0)
My progress in learning to cook has resulted in fewer fire alarms going off. (0.0)
My progress in becoming a morning person: I now wake up at 11 AM. (0.0)
I don't feel that I'm making much progress in learning Spanish. (63.4)