Hi Sunanda,

You could create an onchange on the HTML field and in that onchange simply calculate the amount of words. Something along the lines of:

@api.onchange('your_html_field')
def compute_word_count(self):
    self.number_of_words = len(s.split())

This should give you the length of all words for a specific field (in the most basic form). You might want to add logic or regular expressions to this.

Regards,
Yenthe