Adds documentation of how to configure tasks

docs/configuration.md

@@ -713,10 +713,45 @@ for details on how to set it.
 used during automatic classification. If disabled, paperless will
 still preform some basic text pre-processing before matching.
 
-See also `PAPERLESS_NLTK_DIR`.
+: See also `PAPERLESS_NLTK_DIR`.
 
     Defaults to 1.
 
+`PAPERLESS_EMAIL_TASK_CRON=<cron expression>`
+
+: Configures the scheduled email fetching frequency. The value
+should be a valid crontab(5) expression describing when to run.
+
+: If set to the string "disable", no emails will be fetched automatically.
+
+    Defaults to `*/10 * * * *` or every ten minutes.
+
+`PAPERLESS_TRAIN_TASK_CRON=<cron expression>`
+
+: Configures the scheduled automatic classifier training frequency. The value
+should be a valid crontab(5) expression describing when to run.
+
+: If set to the string "disable", the classifier will not be trained automatically.
+
+    Defaults to `5 */1 * * *` or every hour at 5 minutes past the hour.
+
+`PAPERLESS_INDEX_TASK_CRON=<cron expression>`
+
+: Configures the scheduled search index update frequency. The value
+should be a valid crontab(5) expression describing when to run.
+
+: If set to the string "disable", the search index will not be automatically updated.
+
+    Defaults to `0 0 * * *` or daily at midnight.
+
+`PAPERLESS_SANITY_TASK_CRON=<cron expression>`
+
+: Configures the scheduled sanity checker frequency.
+
+: If set to the string "disable", the sanity checker will not run automatically.
+
+    Defaults to `30 0 * * sun` or Sunday at 30 minutes past midnight.
+
 ## Polling {#polling}
 
 `PAPERLESS_CONSUMER_POLLING=<num>`

docs/usage.md

@@ -191,7 +191,7 @@ different means. These are as follows:
     them further.
 
 Paperless is set up to check your mails every 10 minutes. This can be
-configured on the 'Scheduled tasks' page in the admin.
+configured via `PAPERLESS_EMAIL_TASK_CRON` (see [software tweaks](/configuration#software_tweaks))
 
 ### REST API