search_api-8.x-1.15/modules/search_api_db/config/schema/search_api_db.schema.yml

search_api_db.settings:
  type: config_object
  label: 'Search API DB settings'
  mapping:
    autocomplete_max_occurrences:
      type: float
      label: 'Maximum occurrences of a term until autocomplete suggestions ignores it'