英和和英

for (some) years (past)

over the years

over a long period of years

年来の宿願

【形式ばった表現】 one's long‐cherished desire [wish]

年来の計画

a plan of long standing

10 年来の友人

a friend of ten years' standing

20 年来の大雪

the heaviest snowfall in [for] twenty years《★in は 《主に米国で用いられる》, for は 《主に英国で用いられる》》; the heaviest snowfall that we [they] have had in the past twenty years