There is no way to make a change in a character formed over many years in just a few months.
関連用語
長年にわたって 1: 1. for a very long time 2. for so long 3. over many years 4. over the years 長年にわたって 2 【副】 perennially 長年にわたって~する: do ~ for many years 数カ月以上にわたって: for more than a few months 過去数カ月にわたって: over the last number of months 長年にわたって交際する: go out with someone for years and years〔人と〕 長年にわたって付き合う: go out with someone for years and years〔人と〕 彼は長年にわたって選手生活を送った。: He spent many years in competition. 数カ月から数年にわたって再発を繰り返す痛み: pain that recurs off and on over months or years 長年月にわたって: for a number of years たった数カ月のうちに: in only a matter of months 数カ月または何年にもわたって: over months to years 多年にわたって: 1. for years 2. for years and years 3. over a period of years _年にわたって: 1. for __ years 2. over a __ year period 投票に先立つ数カ月間にわたって: over the months leading up to the voting 数日から数カ月にわたって: from days to months