how many times did magic johnson play the celtics in the playoffa

Magic Johnson played in 20 games against the Celtics in his career.

Interpreted as:

How many times in the regular season did Magic Johnson play the celtics in the playoffa?

	NAME	DATE	GP	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Magic Johnson M. Johnson	12/28/1979	1	LAL	vs	BOS	40	23	8	6	4	0	7	14	50.0	0	0		9	10	90.0	62.5	2	6	7	4
2	Magic Johnson M. Johnson	1/13/1980	1	LAL	@	BOS	21	1	3	2	2	0	0	2	0.0	0	0		1	2	50.0	17.4	1	2	3	1
3	Magic Johnson M. Johnson	2/14/1982	1	LAL	vs	BOS	39	19	10	8			6	11	54.5	0	2	0.0	7	9	77.8	63.5				4
4	Magic Johnson M. Johnson	1/30/1983	1	LAL	@	BOS	42	14	9	10	2	1	5	10	50.0	0	0		4	4	100.0	59.5	2	7	8	1
5	Magic Johnson M. Johnson	2/23/1983	1	LAL	vs	BOS	46	20	13	10	2	1	9	21	42.9	0	1	0.0	2	3	66.7	44.8	6	7	6	3
6	Magic Johnson M. Johnson	2/8/1984	1	LAL	@	BOS	43	20	8	10	6	0	9	13	69.2	0	0		2	2	100.0	72.0	1	7	5	1
7	Magic Johnson M. Johnson	2/24/1984	1	LAL	vs	BOS	40	9	8	18	3	1	4	11	36.4	0	1	0.0	1	2	50.0	37.9	0	8	5	2
8	Magic Johnson M. Johnson	1/16/1985	1	LAL	@	BOS	39	8	7	13	2	0	4	11	36.4	0	1	0.0	0	0		36.4	1	6	3	0
9	Magic Johnson M. Johnson	2/17/1985	1	LAL	vs	BOS	42	37	3	13	2	0	10	16	62.5	0	0		17	19	89.5	75.9	1	2	5	1
10	Magic Johnson M. Johnson	1/22/1986	1	LAL	@	BOS	27	15	1	6	3	0	6	10	60.0	0	0		3	3	100.0	66.3	0	1	0	3
11	Magic Johnson M. Johnson	2/16/1986	1	LAL	vs	BOS	38	6	6	12	2	0	0	4	0.0	0	0		6	6	100.0	45.2	1	5	4	1
12	Magic Johnson M. Johnson	12/12/1986	1	LAL	@	BOS	42	31	7	8	2	1	13	25	52.0	0	0		5	7	71.4	55.2	1	6	2	2
13	Magic Johnson M. Johnson	2/15/1987	1	LAL	vs	BOS	45	39	7	10	2	0	12	20	60.0	1	1	100.0	14	15	93.3	73.3	3	4	4	4
14	Magic Johnson M. Johnson	12/11/1987	1	LAL	@	BOS	44	18	8	17	2	0	6	11	54.5	1	1	100.0	5	6	83.3	66.0	1	7	4	3
15	Magic Johnson M. Johnson	2/14/1988	1	LAL	vs	BOS	42	22	5	14	3	0	9	19	47.4	0	1	0.0	4	7	57.1	49.8	2	3	3	1
16	Magic Johnson M. Johnson	12/16/1988	1	LAL	@	BOS	36	31	3	7	0	0	11	23	47.8	0	2	0.0	9	10	90.0	56.6	1	2	2	4
17	Magic Johnson M. Johnson	12/15/1989	1	LAL	@	BOS	43	16	6	21	6	0	4	12	33.3	0	1	0.0	8	8	100.0	51.5	0	6	3	0
18	Magic Johnson M. Johnson	2/18/1990	1	LAL	vs	BOS	38	30	4	13	1	0	10	21	47.6	3	6	50.0	7	7	100.0	62.3	1	3	4	2
19	Magic Johnson M. Johnson	1/27/1991	1	LAL	@	BOS	38	22	9	15	2	0	9	16	56.3	1	4	25.0	3	3	100.0	63.5	1	8	6	2
20	Magic Johnson M. Johnson	2/15/1991	1	LAL	vs	BOS	41	21	9	16	1	1	7	13	53.8	1	4	25.0	6	8	75.0	63.6	3	6	2	1
	Average		1.0				39.3	20.1	6.7	11.5			7.1	14.2	49.8	0.4	1.3	28.0	5.7	6.6	86.3	59.0				2.0
	Total		20				786	402	134	229			141	283	49.8	7	25	28.0	113	131	86.3	59.0				40