忽Chronology

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58060070080090011001200141015401600170018001900 750–799840–899910–10991290–14091420–1539

1

4

1

3

1

1

1

1

2

1

1

1

1

1

1

1

3

1

1

1

1

1

2

1

3

2

6

7 +1

11 +5

4

8 +2

5

8 +2

9 +3

6

4

2

7 +1

6

5

1

15 +9

1

3

No year recorded 98

+92

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 ↗