惯例付款期

【经】 usance

惯例的英语翻译：

convention; routine; consuetude; practice; rite; rule; tradition; usage
【化】 convention
【医】 nomo-; rut
【经】 consuetude; customary rule; customs and usages; established practices
practice; routine; usage

付款期的英语翻译：

【法】 time of payment