十年一日
Readings
Kana:
じゅうねんいちじつ、じゅうねんいちにち
Romaji:
jūnen'ichijitsu, jūnen'ichinichi
Definition
1
without intermission for ten (long) years; with constancy of purpose for ten (long) years; in the same old rut for years on end
Note:
yojijukugo