painstakingly(in a painstaking manner; very slowly and carefully) adverb [UK: ˈpeɪnz.teɪk.ɪŋ.li] [US: ˈpeɪn.ˌstek.ɪŋ.li]
дотошность noun
hair-splitting(the act of finding exceedingly small differences which are neither important nor prominent) noun [UK: ˈheə.ˈsplɪ.tɪŋ] [US: ˈheə.ˈsplɪ.tɪŋ]