continue off

[Kipihn Yi]

Hi, please help me :-?

'Ellen White began work on Spirit of Prophecy, volume 4, work that would continue off and on for the next four years.'

I cannot understand the bold letters.
Thanks in advance.

 

[5jj]

Hi, please help me :-?

'Ellen White began work on Spirit of Prophecy, volume 4, work that would continue off and on for the next four years.'

I cannot understand the bold letters.
Thanks in advance.

It's not 'continue off', it's 'continuue off and on'.

Off and on (also: on and off) means 'from time to time, now and again'.