This is the 13177th most frequent Korean word.
두자릿수
A "two-digit number."
두자릿수 is used as an adjective to describe 'growth', indicating it reached double digits numerically.
우리의 매출은 올해 두자릿수 성장을 기록했습니다.
Our sales have achieved double-digit growth this year.
두자릿수 describes 'points', emphasizing the numerical achievement of more than ten.
그 선수는 두자릿수 득점을 올렸습니다.
That player scored double-digit points.
두자릿수 here refers to the numerical category indicating a range of values between 10 and 99 inclusive.