American conventions and definitions on terms like periodicity/frequency

 It is observed that America dominates the scholarly environment, hence American conventions and definitions on terms like periodicity/frequency will be followed as is given below:

 

S No	Abbreviation	Periodicity	Frequency	Number
1.	d	Daily	once per day	365/12
2.	i	——–	three times per week	156/12
3.	c	Semi-Weekly	two times per week (‘half of a week’)	104/12
4.	w	Weekly	once per week	52/12
5.	j	——–	three times per month	36/12
6.	e	Bi-Weekly	every two weeks	26/12
7.	s	Semi-Monthly = Fortnight	two times per month (‘half of a month’)	24/12
8.	m	Monthly	once per month	12/12
9.	b	Bi-Monthly	every two months	6/12
10.	q	Quarterly	four times per year	4/12
11.	t	——–	three times per year	3/12
12.	f	Semi-Annual = Bi-Annual	two times per year (‘half of a year’)	2/12
13.	a	Annual	once per year	1/12
14.	g	Biennial	every two years	1/24
15.	h	Triennial	every three years	1/36
16.	z	——–	KNOWN: other frequencies (quadrennial – every four years, quinquennial – every five years, etc.)	1/48, 1/60 etc
17.	k	Irregular	known to be so (no determinable frequency)
18.	u	——–	UNKNOWN other frequencies