名詞 coinage:

1. coins collectively
   同義詞：mintage, specie, metal money
2. a newly invented word or phrase
   同義詞：neologism, neology
3. the act of inventing a word or phrase
   同義詞：neologism, neology

1. I haven't heard that expression before is it a recent coinage?
   我以前從未聽到過這個(gè)詞語--是最近新造的嗎?
2. I hadn't heard that expression before ; is it a recent coinage?
   我以前從未聽到過這個(gè)詞語，是最近新造的嗎？

coin.age

n.（名詞）
The right or process of making coins.
制造硬幣的權(quán)利或過程

Metal currency.
金屬貨幣
A system of metal currency.
金屬貨幣系統(tǒng)

A new word or phrase.
新單詞或短語
The invention of new words.
新單詞的創(chuàng)造
Ancestry or social background:
家世或社會(huì)背景：
例句：
.Count Gengler was of common coinage, but in coming to America he took on a royal name.(Jimmy Breslin)
.吉勒伯爵出身平凡，但到美洲大陸后就冠上了皇家的名字.(吉米·布雷斯林)