从频率的角度说：occasionally(偶尔）稍高于hardly ever （几乎从不）
We go for walks in the fields occasionally.
我们偶而去田野里散步.
We hardly ever go for walks in the fields.
我们几乎不去田野里散步.
He goes to the park occasionally.
他偶尔去公园.
He hardly ever goes to the park.
他几乎不去公园.
Occasionally,I go to school on foot.
我偶尔步行去上学.
I hardly ever go to school on foot.
我几乎不走路上学.