Englishfor English speakers
pull
Verb
—
Someone pulls something when they use their hands to move the thing closer to themselves.
Pull the handle if you want to open the door.
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.
frequency
Noun
—
Something's frequency is how often it happens.
A frequency of one hertz is an event repeated once per second.