Question: What award has the costume designer for the Michael Collins biopic starring Liam Neeson been nomination for, a total of six times?

Context articles: Michael Collins (film)
Tom Broecker
Eimer Ní Mhaoldomhnaigh
Costume designer
Liam Neeson filmography
Costume Designers Guild
The Grey (film)
Gun Shy (film)
Meda Ryan
Anna B. Sheppard

Michael Collins is a 1996 historical biopic written and directed by Neil Jordan and starring Liam Neeson as Michael Collins, the Irish patriot and revolutionary who died in the Irish Civil War.
 It won the Golden Lion at the Venice Film Festival.
Tom Broecker is an American television actor and Emmy-award winning costume designer.
 Currently, he is the costume designer for "Saturday Night Live" (since 1994) and Flesh and Bone (Starz).
 He was the costume designer for NBC's "30 Rock", where he also played the recurring role of Lee the costume designer on the show-within-a-show.
 Other TV credits include House of Cards (Netflix), the first season of The Comeback and the second of season of In Treatment for HBO, The Big C (Showtime), The Beautiful Life on the CW and the pilot of Castle on ABC.
Eimer Ní Mhaoldomhnaigh ] is an Irish costume designer.
 Much of her career has been in Irish productions such as "Michael Collins" (1996), "The Wind That Shakes the Barley" (2006), and "Ondine" (2009).
 She has also designed costumes for feature films including "Becoming Jane" and "Brideshead Revisited".
 Since 2003, the Irish Film & Television Academy has awarded her six ITFA nominations for Best Costume Design.
A costume designer is a person who designs costumes for a film, stage production or television.
 The role of the costume designer is to create the characters and balance the scenes with texture and colour, etc.
 The costume designer works alongside the director, scenic, lighting designer, sound designer, and other creative personnel.
 The costume designer may also collaborate with hair stylist, wig master, or makeup artist.
 In European theatre, the role is different, as the theatre designer usually designs both costume and scenic elements.
Liam Neeson is an Irish actor and voice actor, who rose to prominence with his acclaimed starring role in Steven Spielberg's 1993 Oscar winner "Schindler's List".
 He has since starred in a number of other successful films, including "", "Taken", "Michael Collins", "Les Misérables", "Batman Begins", "Kinsey", "Clash of the Titans", and "The Chronicles of Narnia" series.
 He has been nominated for a number of awards including an Academy Award for Best Actor, a BAFTA Award for Best Actor in a Leading Role and three Golden Globe Awards for Best Actor in a Motion Picture Drama. "
Empire" magazine ranked Neeson among both the "100 Sexiest Stars in Film History" and "The Top 100 Movie Stars of All Time."
The Costume Designers Guild (CDG) was founded in 1953 by a group of 30 motion picture costume designers. Its international membership today includes over 750 motion picture, television, and commercial costume designers, assistant costume designers and costume illustrators.
 In 1976, the Costume Designers Guild joined the International Alliance of Theatrical Stage Employees (IATSE), becoming Local 892 of IATSE.
 Local 892 is centered in Los Angeles.
 The Costume Designers Guild publishes a quarterly magazine, "The Costume Designer", founded in 2005, and a CDG Newsletter six times a year.
 The Costume Designers Guild produces its annual Costume Designers Guild Awards, recognizing excellence in costume design in motion pictures, television, and commercials.
The Grey is a 2011 British-American survival thriller film co-written, produced and directed by Joe Carnahan and starring Liam Neeson, Frank Grillo and Dermot Mulroney.
 It is based on the short story
Gun Shy is a 2000 film written and directed by Eric Blakeney, and starring Liam Neeson, Oliver Platt and Sandra Bullock.
She has written extensively on the Irish revolution of 1916-23.
 Among her books are "The Tom Barry Story" (1982)- later updated and revised as "Tom Barry, IRA Freedom Fighter" in 2003 - "The Day Michael Collins was Shot" (1998), "Michael Collins and the Women in his Life" (1998), "Liam Lynch the Real Chief" (2005) and "Michael Collins and the Women who Spied for Ireland" (2006).
Anna Biedrzycka Sheppard is a Polish costume designer.
 She graduated with architecture from the Academy of Fine Arts in Warsaw and now lives in London.
 A sister to fellow costume designer Magdalena Biedrzycka, Sheppard made many films with directing masters like Steven Spielberg or Roman Polański.
 She has been nominated three times for the Academy Award for Best Costume Design, "Schindler's List" in 1993 and "The Pianist" in 2003, and a third nomination for "Maleficent" shared with Jane Clive.
 She was also nominated for a BAFTA Award for Schindler's List and César Award for "The Pianist".
 Sheppard's work with Thomas Casterline on "Dragonheart" earned her a 1997 Saturn Award nomination as well.