頻Chronology

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5806007008009001000110015401660170018001900 710–799840–899910–9991010–10991200–15391550–1659

1

2

1

3

1

2

1

1

2

1

1

2

2

1

1

1

1

1

1

3

3

5

6

9 +3

3

5

2

1

3

1

1

4

No year recorded 48

+42

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 ↗