Q:

The Black Country in UK

I have encountered the name The Black Country in old books. From Wikipedia: 

The Black Country is a loosely defined area of the English West Midlands conurbation, to the north and west of Birmingham, and to the south and east of Wolverhampton.

Is that name still applicable to this area nowadays? Is it a widely known definition among the UK population and English speaking society, in general?

A:

Google Ngram Viewer suggests the term did not noticeably decline in popularity over the course of the 20th century:

