Correct

许久

/ xǔjiǔ / 
Strokes

Definition

for a long time/for ages

Example

As a Noun

long time

1
Tā
他
xǔjiǔ
许久
méi
没
lái
来
le
了
  
。

It's been ages since he came last time.

2
Tánlùn
谈论
xǔjiǔ
许久

talk (about sth) for a long time