Inconsistent frequency suffixes: some have 'ly', others do not

[deoren]

For example, here are the current keywords:

DATE_LABEL = {
    'daily':TODAY,
    'twice_week':TODAY,
    'weekly':TODAY,
    'weekly_monday':TODAY,
    'weekly_tuesday':TODAY,
    'weekly_wednesday':TODAY,
    'weekly_thursday':TODAY,
    'weekly_friday':TODAY,
    'weekly_saturday':TODAY,
    'weekly_sunday':TODAY,
    'twice_month':TODAY,
    'monthly':MONTH_YEAR,
    'twice_year':MONTH_YEAR,
    'quarterly':MONTH_YEAR,
    'yearly':YEAR
}

We have weekly, and twice_week instead of twice_weekly.

Not sure we should support pattern matching in order to satisfy a requirement, but it would probably be useful to have a small hash with aliases for common items.

An alternative is to adjust all entries to use consist ly suffixes. This might be the best approach in the long run.