how many times did tim duncan score 28 points and have 15 rebounds or more in a game

Tim Duncan played 73 games with 28+ points and 15+ rebounds.

Interpreted as:

How many times in the regular season did Tim Duncan score 28 or more points and have 15 rebounds or more in a game?

	NAME	DATE	GP	PTS	REB	TM		OPP	MIN	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Tim Duncan T. Duncan	1/10/1998	1	28	16	SAS	vs	SAC	39	4	1	0	12	18	66.7	0	0		4	8	50.0	65.1	2	14	2	1	+35
2	Tim Duncan T. Duncan	1/14/1998	1	28	17	SAS	@	WAS	43	4	0	0	12	19	63.2	0	0		4	8	50.0	62.2	6	11	4	3	+12
3	Tim Duncan T. Duncan	2/21/1998	1	29	15	SAS	vs	UTA	45	2	2	3	11	21	52.4	0	1	0.0	7	12	58.3	55.2	1	14	0	0	-1
4	Tim Duncan T. Duncan	2/24/1998	1	28	19	SAS	vs	MIN	36	3	0	1	10	20	50.0	0	0		8	13	61.5	54.4	10	9	6	4	+1
5	Tim Duncan T. Duncan	3/2/1998	1	29	17	SAS	@	SAC	38	3	0	3	10	15	66.7	0	0		9	12	75.0	71.5	5	12	6	4	+15
6	Tim Duncan T. Duncan	3/4/1998	1	35	17	SAS	@	GSW	45	2	1	5	13	24	54.2	0	0		9	12	75.0	59.8	6	11	10	2	-11
7	Tim Duncan T. Duncan	4/10/1998	1	28	17	SAS	vs	SEA	46	5	0	7	13	23	56.5	0	0		2	3	66.7	57.6	4	13	3	2	+22
8	Tim Duncan T. Duncan	3/19/1999	1	29	15	SAS	@	POR	43	1	1	5	10	17	58.8	0	1	0.0	9	11	81.8	66.4	5	10	2	1	-5
9	Tim Duncan T. Duncan	4/27/1999	1	32	19	SAS	@	SAC	52	3	2	0	12	28	42.9	0	1	0.0	8	12	66.7	48.1	6	13	4	5	-6
10	Tim Duncan T. Duncan	11/24/1999	1	31	15	SAS	@	BOS	37	4	1	2	12	17	70.6	0	0		7	7	100.0	77.2	3	12	2	2	+37
11	Tim Duncan T. Duncan	12/17/1999	1	30	17	SAS	vs	BOS	35	0	1	5	7	14	50.0	0	0		16	18	88.9	68.4	4	13	5	3	+28
12	Tim Duncan T. Duncan	12/30/1999	1	32	15	SAS	@	VAN	44	4	1	4	12	24	50.0	0	0		8	10	80.0	56.3	3	12	5	4	+8
13	Tim Duncan T. Duncan	1/13/2000	1	33	20	SAS	@	SAC	43	3	2	3	9	18	50.0	1	1	100.0	14	19	73.7	62.6	2	18	6	1	-7
14	Tim Duncan T. Duncan	1/14/2000	1	32	16	SAS	@	SEA	44	0	2	4	12	22	54.5	0	1	0.0	8	8	100.0	62.7	6	10	4	3	-12
15	Tim Duncan T. Duncan	1/22/2000	1	33	15	SAS	vs	NYK	44	5	0	4	9	19	47.4	0	0		15	18	83.3	61.3	4	11	5	1	+25
16	Tim Duncan T. Duncan	2/1/2000	1	29	18	SAS	vs	LAL	41	4	0	1	11	19	57.9	0	0		7	8	87.5	64.4	4	14	1	3	+20
17	Tim Duncan T. Duncan	2/3/2000	1	32	17	SAS	vs	TOR	40	7	3	1	11	22	50.0	0	0		10	10	100.0	60.6	6	11	2	2	+23
18	Tim Duncan T. Duncan	3/27/2000	1	30	18	SAS	@	SEA	44	3	2	1	14	20	70.0	0	0		2	2	100.0	71.8	4	14	5	3	+13
19	Tim Duncan T. Duncan	3/28/2000	1	36	15	SAS	@	POR	47	6	1	3	13	21	61.9	0	0		10	11	90.9	69.7	5	10	3	3	+9
20	Tim Duncan T. Duncan	12/23/2000	1	29	16	SAS	@	CHA	50	0	1	1	12	21	57.1	1	1	100.0	4	10	40.0	57.1	3	13	7	2	-7
21	Tim Duncan T. Duncan	1/20/2001	1	29	17	SAS	vs	ORL	51	2	1	3	12	20	60.0	0	0		5	13	38.5	56.4	7	10	5	3	+2
22	Tim Duncan T. Duncan	1/25/2001	1	36	21	SAS	@	SAC	44	1	0	2	15	23	65.2	0	0		6	9	66.7	66.8	5	16	2	2	+5
23	Tim Duncan T. Duncan	2/8/2001	1	35	21	SAS	@	NJN	45	5	0	1	12	23	52.2	0	0		11	18	61.1	56.6	7	14	2	3	-3
24	Tim Duncan T. Duncan	2/13/2001	1	28	15	SAS	vs	DAL	39	6	0	6	7	15	46.7	0	1	0.0	14	24	58.3	54.8	2	13	4	4	+18
25	Tim Duncan T. Duncan	3/16/2001	1	29	16	SAS	vs	NJN	37	3	2	5	11	21	52.4	1	1	100.0	6	11	54.5	56.1	5	11	0	3	+24
	Average		1.0	30.9	17.0				42.0	3.7	0.9	2.6	11.6	20.8	55.7	0.1	0.3	20.0	7.7	10.6	72.6	60.7	4.8	12.2	3.3	2.9	8.1
	Total		73	2,259	1,244				3,066	271	63	188	847	1,521	55.7	4	20	20.0	561	773	72.6	60.7	351	893	243	211	+591