Areas can be constituted-of-or-filled-with usage.Logical formLearned from13 sentences. A usage can be controversial.Logical formLearned from13 sentences. A usage can be obsolete.Logical formLearned from13 sentences. Usages can be idiomatic.Logical formLearned from13 sentences. Contrast can be to a usage.Logical formLearned from13 sentences. Usage may fall.Logical formLearned from13 sentences. Usages can be constituted-of-or-filled-with words.Logical formLearned from13 sentences. A usage can be gentle.Logical formLearned from13 sentences. A usage may spread.Logical formLearned from13 sentences. A part may pertain-to a usage.Logical formLearned from13 sentences. (Usage patterns) may change.Logical formLearned from13 sentences. A (usage rate) can be high.Logical formLearned from13 sentences. A usage may pertain-to an option.Logical formLearned from13 sentences. Details may pertain-to a usage.Logical formLearned from13 sentences. A usage may pertain-to a concept.Logical formLearned from13 sentences.