YOU SAID:
For the majority of the twentieth century
INTO JAPANESE
20世紀の大半にわたって
BACK INTO ENGLISH
For most of the 20th century
INTO JAPANESE
20世紀のほとんどの間
BACK INTO ENGLISH
During most of the 20th century
INTO JAPANESE
20世紀の大半
BACK INTO ENGLISH
Most of the 20th century
INTO JAPANESE
20世紀の大半
BACK INTO ENGLISH
Most of the 20th century
Well done, yes, well done!