also: ちよ
noun
many nights; a thousand nights
Archaic or literary expression for a great number of nights, often used poetically. Not used in modern everyday speech.
千夜を経て、ようやく春が訪れた。
After a thousand nights, spring finally arrived.
Compound of 千 (sen, 'thousand') and 夜 (ya, 'night'). The reading ちよ is irregular and likely a classical or poetic variant.