蝦夷方言藻汐草

NINJAL explicitly gives hoski sakne etoko ta for 三年前に. Tamura’s hoski sakne and temporal etoko ta explain the divisions and retain the final タ recorded here. The source begins the final element with イ rather than エ; hoskisakne itoko ta records that vowel-explicit alternative without an independent full-form match. The two complete spaced corpus matches are the dictionary row and a bot repost, representing one source. This supports the reading at medium confidence but does not establish its eighteenth-century grammar or an independently attested exact year offset. The companion ホシケシヤキ子ヱトコ lacks the final タ.