週間 is read as しゅうかん (shuukan) and means week.
しゅうかん
shuukan
いっしゅうかん
one week
にしゅうかん
two weeks
しゅうかんてんきよほう
weather forecast for coming week
まるいっしゅうかん
the whole week
かさいよぼうしゅうかん
Fire Prevention Week
ぼうさいしゅうかん
Disaster Preparedness Week
ぜんこくあんぜんしゅうかん
National Safety Week
おうごんしゅうかん
Golden Week (early-May holiday season in Japan)
すうしゅうかん
several weeks
あいちょうしゅうかん
Bird Week (starting on May 10 of each year)
しゅう
week
しゅうきゅう
weekly holiday