"One of the biggest surprises from the survey, community leaders said, is the time employers think it takes to learn English. Almost half of employers said it should take six to 12 months to learn English, the survey said."
The US Department of State classifies various languages by difficulty; it all depends on your first language. But let's look at category III, which for English speakers would include Russian and Persian. According to the National Foreign Language Center, the DoS estimates that
"44 weeks of intensive language training in U.S. government language schools (five days per week, six hours per day) are required to achieve minimum working proficiency... Similar results are achieved after five years of typical college language courses, especially if students spend at least one semester abroad learning the language, in addition to their language courses in the US...
"What is 'minimal working proficiency?' Someone able to function on their own, able to talk about familiar topics and daily life."
And how many of these immigrants have the wherewithal to attend high-quality full-time English-language courses?
By the way, the survey also found that more than 80% of immigrants and refugees say they have formally tried to learn English.