how many conference title does boston celtics have

The Boston Celtics won a championship in 1956-57.

Interpreted as:

How many conference title in a regular season does boston celtics have?

	TEAM	CHAMPS	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Celtics	1	1956-57	72	241.4	105.5	68.9	20.3			39.0	101.8	38.3				27.5	36.7	75.0	44.8				17,380	7,599	4,963	1,464				1,851
2	Celtics	1	1958-59	72	242.8	116.4	77.8	21.8			44.6	112.7	39.5				27.3	35.6	76.6	45.3				17,480	8,379	5,601	1,568				1,769
3	Celtics	1	1959-60	75	241.0	124.5	80.2	24.7			49.9	119.6	41.7				24.7	33.6	73.4	46.3				18,075	9,337	6,014	1,849				1,856
4	Celtics	1	1960-61	79	241.3	119.7	77.6	23.7			46.8	117.7	39.8				26.1	35.6	73.3	44.9				19,060	9,460	6,131	1,872				2,032
5	Celtics	1	1961-62	80	240.9	121.1	76.0	25.6			48.2	113.9	42.3				24.7	33.9	72.8	47.0				19,275	9,687	6,080	2,049				1,909
6	Celtics	1	1962-63	80	240.9	118.8	72.7	24.5			46.8	109.7	42.7				25.2	34.7	72.5	47.5				19,275	9,504	5,818	1,960				2,090
7	Celtics	1	1963-64	80	240.9	113.0	71.7	22.0			45.2	109.6	41.3				22.6	31.1	72.5	45.8				19,275	9,042	5,736	1,760				2,125
8	Celtics	1	1964-65	80	240.9	112.8	71.9	22.2			44.6	107.6	41.4				23.6	32.3	73.1	46.3				19,275	9,024	5,748	1,772				2,065
9	Celtics	1	1965-66	80	240.3	112.7	69.9	22.4			43.6	104.6	41.7				25.5	34.5	73.9	47.0				19,225	9,014	5,591	1,795				2,012
10	Celtics	1	1967-68	82	240.3	116.1	69.1	21.9			45.0	102.1	44.0				26.2	36.4	72.1	49.2				19,705	9,523	5,666	1,798				2,147
11	Celtics	1	1968-69	82	241.8	111.0	59.0	23.8			43.7	101.4	43.1				23.6	32.4	72.9	48.0				19,830	9,102	4,840	1,953				2,073
12	Celtics	1	1973-74	82	241.2	109.0	54.3	26.7	6.8	3.7	44.3	97.2	45.6				20.5	25.6	80.0	50.3	16.8	37.5	21.9	19,780	8,937	4,452	2,187	561	305	1,796	1,868
13	Celtics	1	1975-76	82	240.9	106.2	52.9	24.1	6.8	3.2	43.0	96.4	44.6				20.2	25.9	78.0	49.3	16.7	36.2	19.6	19,755	8,708	4,341	1,980	561	260	1,609	2,002
14	Celtics	1	1980-81	82	241.2	109.9	43.6	26.9	8.3	7.2	43.7	86.6	50.4	0.8	2.9	27.0	21.7	28.9	75.2	55.3	14.1	29.6	19.2	19,780	9,008	3,579	2,202	683	594	1,577	1,990
15	Celtics	1	1983-84	82	243.4	112.1	45.1	25.9	8.2	5.2	44.1	88.2	50.0	0.7	2.8	24.0	23.3	29.4	79.2	55.4	14.1	31.0	17.3	19,955	9,194	3,697	2,122	673	430	1,420	1,949
16	Celtics	1	1985-86	82	242.1	114.1	46.4	29.1	7.8	6.2	45.3	89.2	50.8	1.7	4.8	35.1	21.8	27.4	79.4	56.4	12.9	33.6	16.6	19,855	9,359	3,807	2,387	641	511	1,360	1,756
17	Celtics	1	2007-08	82	240.9	100.5	42.0	22.4	8.5	4.6	36.4	76.7	47.5	7.3	19.1	38.1	20.5	26.5	77.1	56.9	10.1	31.9	15.2	19,755	8,245	3,445	1,833	696	379	1,246	1,864
18	Celtics	1	2023-24	82	241.8	120.6	46.3	26.9	6.8	6.6	43.9	90.2	48.7	16.5	42.5	38.8	16.3	20.2	80.7	60.9	10.7	35.6	11.9	19,830	9,887	3,799	2,207	557	538	979	1,326