4. Difference Between

(4.1.1) What is the difference between 'a number of' and 'the number of'
(4.1.2) Difference between 'People' and 'Peoples'
(4.1.3) Difference between Many and Many a
(4.1.4) Fairly and Rather 
(4.1.5) Difference between 'In Time' and 'On Time'  
(4.1.6) Differnce between 'No' and 'Not'
(4.1.7) Difference between 'Beside' and 'Besides'
(4.1.8) Difference between 'Before' and 'Ago'.

(4.1.9) Difference between 'A' and 'One' 

(4.1.10) Difference between 'Clean' and 'Clear'

(3.1.8) Use of 'Its' and 'It's'  Difference between 'Its' and 'It's' 

(4.1.11) Difference between 'Good' and 'well'

(4.6.12) Difference between 'Write with' and 'Write in'

(6.1.13) Difference between 'Hear' and 'Listen'