一いち両りょう日じつ

い

ち

りょ

う

じ

つ

Meanings

1

noun

a day or two

Used to refer to a short, indefinite period of one or two days. Often appears in formal or written contexts.

数すう日じつ
数日 means 'a few days' (typically 3–4 or more), while 一両日 is specifically 'one or two days'.
一いち日にち二日ふつか
一日二日 is a more colloquial way to say 'one or two days', whereas 一両日 is slightly more formal and often used in business or written language.

Compound of 一 (one), 両 (both/two), and 日 (day). The combination 一両 is used to mean 'one or two' in a compact form.