how many directors directed at least 2 episodes?
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col : № | # | title | directed by | written by | original air date | production\ncode row 1 : 1 | 1 | "class of beverly hills" | tim hunter | darren star | october 4, 1990 | – row 2 : 2 | 2 | "the green room" | michael uno | david stenn | october 11, 1990 | 2190001 row 3 : 3 | 3 | "every dream has its price (tag)" | catlin adams | amy spies | october 18, 1990 | 2190002 row 4 : 4 | 4 | "the first time" | bethany rooney | darren star | october 25, 1990 | 2190003 row 5 : 5 | 5 | "one on one" | artie mandelberg | charles rosin | november 1, 1990 | 2190004 row 6 : 6 | 6 | "higher education" | artie mandelberg | jordan budde | november 15, 1990 | 2190005 row 7 : 7 | 7 | "perfect mom" | bethany rooney | darren star | november 22, 1990 | 2190006 row 8 : 8 | 8 | "the 17-year itch" | jefferson kibbee | amy spies | november 29, 1990 | 2190007 row 9 : 9 | 9 | "the gentle art of listening" | dan attias | charles rosin | december 6, 1990 | 2190008 row 10 : 10 | 10 | "isn't it romantic?" | nancy malone | charles rosin | january 3, 1991 | 2190009 row 11 : 11 | 11 | "b.y.o.b." | miles watkins | jordan budde | january 10, 1991 | 2190010 row 12 : 12 | 12 | "one man and a baby" | burt brinckerhoff | amy spies | january 24, 1991 | 2190011 row 13 : 13 | 13 | "slumber party" | charles braverman | darren star | january 31, 1991 | 2190012 row 14 : 14 | 14 | "east side story" | dan attias | charles rosin | february 14, 1991 | 2190013 row 15 : 15 | 15 | "a fling in palm springs" | jefferson kibbee | jordan budde | february 21, 1991 | 2190014 row 16 : 16 | 16 | "fame is where you find it" | paul schneider | charles rosin & karen rosin | february 28, 1991 | 2190015 row 17 : 17 | 17 | "stand (up) and deliver" | burt brinckerhoff | amy spies | march 7, 1991 | 2190016 row 18 : 18 | 18 | "it's only a test" | charles braverman | darren star | march 28, 1991 | 2190017 row 19 : 19 | 19 | "april is the cruelest month" | dan attias | steve wasserman & jessica klein | april 11, 1991 | 2190018 row 20 : 20 | 20 | "spring training" | burt brinckerhoff | charles rosin | april 25, 1991 | 2190019 row 21 : 21 | 21 | "spring dance" | darren star | darren star | may 2, 1991 | 2190020 row 22 : 22 | 22 | "home again" | charles braverman | amy spies | may 9, 1991 | 2190021
how many directors directed at least 2 episodes?
№ # Title Directed by Written by Original air date Production\ncode
1 1 "Class of Beverly Hills" Tim Hunter Darren Star October 4, 1990 –
2 2 "The Green Room" Michael Uno David Stenn October 11, 1990 2190001
3 3 "Every Dream Has Its Price (Tag)" Catlin Adams Amy Spies October 18, 1990 2190002
4 4 "The First Time" Bethany Rooney Darren Star October 25, 1990 2190003
5 5 "One on One" Artie Mandelberg Charles Rosin November 1, 1990 2190004
6 6 "Higher Education" Artie Mandelberg Jordan Budde November 15, 1990 2190005
7 7 "Perfect Mom" Bethany Rooney Darren Star November 22, 1990 2190006
8 8 "The 17-Year Itch" Jefferson Kibbee Amy Spies November 29, 1990 2190007
9 9 "The Gentle Art of Listening" Dan Attias Charles Rosin December 6, 1990 2190008
10 10 "Isn't it Romantic?" Nancy Malone Charles Rosin January 3, 1991 2190009
11 11 "B.Y.O.B." Miles Watkins Jordan Budde January 10, 1991 2190010
12 12 "One Man and a Baby" Burt Brinckerhoff Amy Spies January 24, 1991 2190011
13 13 "Slumber Party" Charles Braverman Darren Star January 31, 1991 2190012
14 14 "East Side Story" Dan Attias Charles Rosin February 14, 1991 2190013
15 15 "A Fling in Palm Springs" Jefferson Kibbee Jordan Budde February 21, 1991 2190014
16 16 "Fame is Where You Find It" Paul Schneider Charles Rosin & Karen Rosin February 28, 1991 2190015
17 17 "Stand (Up) and Deliver" Burt Brinckerhoff Amy Spies March 7, 1991 2190016
18 18 "It's Only a Test" Charles Braverman Darren Star March 28, 1991 2190017
19 19 "April is the Cruelest Month" Dan Attias Steve Wasserman & Jessica Klein April 11, 1991 2190018
20 20 "Spring Training" Burt Brinckerhoff Charles Rosin April 25, 1991 2190019
21 21 "Spring Dance" Darren Star Darren Star May 2, 1991 2190020
22 22 "Home Again" Charles Braverman Amy Spies May 9, 1991 2190021
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