to the tune of

Prepositional phrase

literally idiomatic

(literally) Fitting the melody of. / (idiomatic) Roughly; about; to the approximate sum or extent of.

Japanese Meaning

（直訳で）その曲調に合わせて / （慣用的に）おおよそ、大体、約

She sang the poem to the tune of an old folk song.

彼女は古いフォークソングの旋律に合わせてその詩を歌った。

Sense（1）

(literally) Fitting the melody of.

The lyrics were written to the tune of "Amazing Grace".

Sense（2）

(idiomatic) Roughly; about; to the approximate sum or extent of.

The damage that he did to his car was to the tune of two grand.