ReadonlygranularityReadonlykeywordsReadonlypointsColumn names: the keywords themselves, or the keyword|geo series when comparing geos.
Plain object array with a date key and one key per series — the JS answer to to_dataframe().
CSV text with a header row: date followed by one column per series.
Same rows as toArray, with ISO 8601 date strings. Also used by JSON.stringify.
Interest over time for one or more keywords.