Beyond the fact that it appears within a searchable attribute, the number of occurrences / frequency of a search word within an attribute does not lead to a higher ranking with Algolia's ranking criteria.
The Algolia "Words" ranking criterion explicitly does not add more weight for a higher frequency of the searched word.
For example, if the user types 2 words, the maximum score for this criterion is 2 - even if a record contains each word 10 times.