Correlation

1. History of Investigating Grammar

1.1. The first period began before 1900

1.1.1. Early (prenormative) grammar (reproduces the Latin classification of the word-classes)

1.1.2. Prescriptive grammar (provides rules for correct usage)

1.1.3. Classical scientific grammar (an effort to explain language in scientific terms)

1.2. The second period took XX and XXI centuries

1.2.1. Structural grammar

1.2.2. Transformational grammar

1.2.3. Cognitive grammar

2. History of Linguistics

2.1. Comparative Linguistics

2.1.1. Chronology: XIX century

2.1.2. The main idea: historical relatedness

2.2. Generative Linguistics

2.2.1. Chronology: 50-80s of the XX century

2.2.2. The main idea: grammar -> a system of rules -> generating sentences

2.3. Structural Linguistics

2.3.1. Chronology: the 1st half of the XX century

2.3.2. The main idea: language -> structure

3. They both formulate rules. Linguistics requires to know how languages develop and its usage in everyday life, etc. Grammar is about of rules in structure of language

4. They both began to be studied in XIX centuries