non-churchgoer       
noun [ C ] (also nonchurchgoer) uk/ˌnɒnˈtʃɜːtʃˌɡəʊ.ər/ us/ˌnɑːnˈtʃɝːtʃˌɡoʊ.ɚ/
 不做礼拜者
a person who does not go to church regularly
  He used to be a non-churchgoer, but later became a committed Christian. 他曾经是一个不去教堂的人,但后来成为了一名坚定的基督徒。 
 She is a nonchurchgoer who only goes to church for weddings and funerals.
  - More examples
 - He believes non-churchgoers should not have to pay taxes in order to subsidize churches.
 - He was deeply respected by churchgoers and non-churchgoers alike.
 - It's easier to invite a nonchurchgoer to an outdoor event than to a church service.