Learning

google

ref

Old English leornung (see learn, -ing1).

wiktionary

ref

Corresponding to learn +‎ -ing, from Middle English lerninge, used in all modern senses (act of learning; accumulated knowledge; thing learned).

etymonline

ref

learning (n.)

Old English leornung "study, action of acquiring knowledge," verbal noun from leornian (see learn). Meaning "knowledge acquired by systematic study, extensive literary and scientific culture" is from mid-14c. Learning curve attested by 1907.