how many times did mutombo have 20 rebounds in a game

Dikembe Mutombo had 52 games played with 20+ rebounds.

Interpreted as:

How many times in the regular season did mutombo have 20 or more rebounds in a game?

	NAME	DATE	GP	REB	TM		OPP	MIN	PTS	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Dikembe Mutombo D. Mutombo	11/26/1991	1	20	DEN	vs	CHA	45	21	4	0	4	8	15	53.3	0	0		5	7	71.4	58.1	4	16	5	4
2	Dikembe Mutombo D. Mutombo	12/26/1991	1	22	DEN	vs	GSW	42	15	0	1	2	5	12	41.7	0	0		5	7	71.4	49.7	9	13	1	3
3	Dikembe Mutombo D. Mutombo	2/3/1992	1	21	DEN	@	MIN	45	39	4	1	2	12	21	57.1	0	0		15	21	71.4	64.5	13	8	2	3
4	Dikembe Mutombo D. Mutombo	1/30/1993	1	22	DEN	vs	CHI	45	29	0	1	3	9	14	64.3	0	0		11	17	64.7	67.5	7	15	2	4
5	Dikembe Mutombo D. Mutombo	3/15/1993	1	23	DEN	vs	MIA	50	8	1	1	1	2	7	28.6	0	0		4	4	100.0	45.7	4	19	2	4
6	Dikembe Mutombo D. Mutombo	4/18/1993	1	21	DEN	vs	LAC	43	16	2	1	12	5	15	33.3	0	0		6	11	54.5	40.3	9	12	1	3
7	Dikembe Mutombo D. Mutombo	11/12/1993	1	24	DEN	@	LAL	34	11	5	1	7	3	4	75.0	0	0		5	7	71.4	77.7	8	16	6	2
8	Dikembe Mutombo D. Mutombo	12/5/1993	1	23	DEN	vs	DAL	41	12	1	0	9	6	11	54.5	0	0		0	4	0.0	47.0	6	17	2	4
9	Dikembe Mutombo D. Mutombo	1/14/1994	1	20	DEN	@	NJN	34	15	1	0	3	4	8	50.0	0	0		7	14	50.0	53.0	8	12	5	4
10	Dikembe Mutombo D. Mutombo	3/28/1994	1	21	DEN	@	SEA	41	9	2	1	4	2	6	33.3	0	0		5	8	62.5	47.3	6	15	1	2
11	Dikembe Mutombo D. Mutombo	11/11/1994	1	26	DEN	@	LAL	53	19	1	0	9	6	7	85.7	0	0		7	10	70.0	83.3	7	19	1	3
12	Dikembe Mutombo D. Mutombo	11/17/1994	1	20	DEN	vs	DET	43	14	2	1	5	3	7	42.9	0	0		8	14	57.1	53.2	9	11	2	3
13	Dikembe Mutombo D. Mutombo	12/3/1994	1	22	DEN	vs	CHA	45	11	0	0	2	5	8	62.5	0	0		1	2	50.0	61.9	3	19	2	2
14	Dikembe Mutombo D. Mutombo	1/3/1995	1	22	DEN	@	MIN	44	10	3	1	5	4	6	66.7	0	0		2	3	66.7	68.3	5	17	3	5
15	Dikembe Mutombo D. Mutombo	1/11/1995	1	20	DEN	@	UTA	36	12	1	0	2	4	9	44.4	0	0		4	6	66.7	51.5	10	10	3	4
16	Dikembe Mutombo D. Mutombo	2/3/1995	1	21	DEN	@	LAL	48	10	0	1	8	4	5	80.0	0	0		2	2	100.0	85.0	5	16	3	1
17	Dikembe Mutombo D. Mutombo	4/16/1995	1	20	DEN	vs	SAS	37	8	3	0	8	3	7	42.9	0	0		2	2	100.0	50.8	7	13	2	5
18	Dikembe Mutombo D. Mutombo	12/16/1995	1	20	DEN	@	ATL	46	11	2	0	6	5	12	41.7	0	1	0.0	1	3	33.3	41.3	4	16	5	3
19	Dikembe Mutombo D. Mutombo	3/26/1996	1	31	DEN	vs	CHA	51	16	0	1	6	5	9	55.6	0	0		6	8	75.0	63.9	8	23	0	5
20	Dikembe Mutombo D. Mutombo	11/7/1996	1	20	ATL	@	SAC	45	22	0	0	4	9	11	81.8	0	0		4	7	57.1	78.1	5	15	5	2	+11
21	Dikembe Mutombo D. Mutombo	11/26/1996	1	21	ATL	vs	VAN	34	14	2	0	3	6	10	60.0	0	0		2	4	50.0	59.5	4	17	2	1	+26
22	Dikembe Mutombo D. Mutombo	1/7/1997	1	21	ATL	vs	PHX	50	22	2	0	5	7	9	77.8	0	0		8	8	100.0	87.9	5	16	5	3	-1
23	Dikembe Mutombo D. Mutombo	1/11/1997	1	21	ATL	vs	SAS	49	15	2	0	2	4	8	50.0	0	0		7	11	63.6	58.4	6	15	2	4	+10
24	Dikembe Mutombo D. Mutombo	4/9/1998	1	24	ATL	vs	IND	41	20	2	2	3	6	11	54.5	0	0		8	13	61.5	59.8	10	14	2	4	-8
25	Dikembe Mutombo D. Mutombo	3/16/1999	1	20	ATL	@	IND	39	10	0	2	2	5	9	55.6	0	0		0	0		55.6	5	15	3	4	+6
	Average		1.0	22.0				41.8	13.7	1.4	0.5	4.2	4.5	8.7	52.1	0.0	0.0	0.0	4.6	6.6	70.0	58.9	6.7	15.3	2.8	2.9	3.4
	Total		52	1,143				2,173	712	74	27	217	236	453	52.1	0	1	0.0	240	343	70.0	58.9	347	796	145	151	+111