Night weaning help needed

How can i go about weaning my 14 month girl from nursing through the night?

Its getting too much and I barely get any sleep as she wakes every 2-3 hours in the night. She needs it to go back to sleep (a bad habit unfortunately)

How do I go about it and for those who have done it how long did it take for their LO to learn to break that habit during the weaning process?

TIA