code: def use_general_term_frequencies(self):
  		'''
  		Returns
  		-------
  		PriorFactory
  		'''
  		tdf = self._get_relevant_term_freq()
  		bg_df = self.term_doc_mat.get_term_and_background_counts()[['background']]
  		bg_df = pd.merge(tdf,
  		                 bg_df,
  		                 left_index=True,
  		                 right_index=True,
  		                 how='left').fillna(0.)
  		self._store_priors_from_background_dataframe(bg_df)
  		return self use_general_term_frequencies(self):
  		'''
  		Returns
  		-------
  		PriorFactory
  		'''
  		tdf = self._get_relevant_term_freq()
  		bg_df = self.term_doc_mat.get_term_and_background_counts()[['background']]
  		bg_df = pd.merge(tdf,
  		                 bg_df,
  		                 left_index=True,
  		                 right_index=True,
  		                 how='left').fillna(0.)
  		self._store_priors_from_background_dataframe(bg_df)
  		return self
docs: Returns
  		-------
  		PriorFactory