頻度の確率

100%  always                                   常に, 必ず, 全部
 90%  almost always                            ほぼ必ず
 80%  usually, normally, generally             普通, 大抵, 大体
 70%  very, often, frequently                  とてもよく, 頻繁
 60%  often                                    しばしば, よく
 50%  sometimes                                ときどき
 40%  occasionally                             偶に
 30%- seldom, rarely                           滅多に無い
 10%- almost naver, hardly ever, scarcely ever まず無い
  0%  never                                    必ず無い, ゼロ