without her knowledge vs without her understanding

Question

A complete search of the internet has found these results:

without her knowledge is the most popular phrase on the web.

Some examples from the web:

And if you try to make it look like I did without her knowledge, no jury's ever going to believe it because it's not true.
It is in compliance with this regulation that the children of Mrs Colombo from Milan were removed from school without her knowledge.
He took them without her knowledge.
Dad could have been monitoring Ashley's chats without her knowledge.
France maintains that they are jihadists, who came to fight on their own initiative and without her knowledge.
You put cameras in Melanie's hotel room without her knowledge and then aired it on national TV.
I found all this and, worst of all, a video taken of her without her knowledge.
The microchip was implanted without her knowledge.

Some examples from the web:

Answer 1

More popular!

without her knowledge

961,000 results on the web

Answer 2

214,000 results on the web