愁Chronology

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50058060071083010001150120014101590160017801800 510–579620–709720–829860–9991010–11491290–14091420–15891690–1779

1

1

1

1

1

1

2

1

1

1

1

1

1

1

9 +3

1

2

1

5

1

5

1

2

1

1

No year recorded 54

+48

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗