proficiency

The state or quality of being proficient; competence.

Advancement; progress.

The state of being proficient; the degree of advancement attained in any branch of knowledge; advance in the acquisition of any art, science, or knowledge; improvement: as, to attain great proficiency in Greek or in music.

Synonyms Advance, etc. (see progress), skill.

Ability, skill, competence.

Knowledge.

skillfulness in the command of fundamentals deriving from practice and familiarity

the quality of having great facility and competence