level of experience; background
Used to describe how much experience someone has, often in a professional or skill-based context. Can refer to a quantifiable degree or a general experiential background.
A high level of experience is required for this job.
Considering his background, we appointed him as the project leader.
Compound of 経験 (experience) and 度 (degree, level). The exact historical derivation is uncertain, but the word follows a common pattern for forming nouns indicating a measurable degree of something.