Emmigration

[Erick Olofsson]

Would someone please lookup information as to when my grandfather Olaf peterson Emmigrated to USA and also furnish the ship names if possible.  
He traveled back and forth 2 to three times possibly 1879, 3/31/1882, July, 1886 to USA,however his last child was born in 1890. So it might have been before after that year.
He used The Name Olaf Peterson, Olof Peterson, Olaf Pederson and Ola Andreason.
Born 1/3/1855, 1/4/1855 @ farm MORHULT Denmark his family moved to Sweden right after his birth Baptized 1/8/1857 & confirmed 1869 Emigrated several times possibly 1879, 3/31/1882, July, 1886 to USA Freeholder/farmer in Göshult Södregärd Markaryd, Sweden Lived at 33 Misterhults Mallangård