Deep seated is the standard phrase for something firmly established. Deep seeded is a common misspelling shaped by sound.
schedule
Why “none” can be singular or plural
“None” can take a singular or plural verb. The best choice depends on whether you mean not one or not any.
Toe the line: the original phrase and what it means
The standard phrase is toe the line. It started with toes placed on a line, and now it means following rules or meeting a standard.
Groak: the word for staring at someone who is eating
Groak names the act of staring at someone while they eat, hoping for food. It is an informal, playful word with a very clear image.
Nerve wracking or nerve racking, both can be correct
“Nerve racking” is more common, but “nerve wracking” is also a recognized variant in many dictionaries. Here is how to use both.