We look at the division of 20020912 by 977 
The aim is to understand the frequency of 977 in 20020912.

On to step 1:
When dividing 2 by 977, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 977

Going ahead to step 2:
The number 977 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Take the next digit (0) from the dividend and append it to 20, then repeat: 200 / 977

Let's proceed to step 3:
When dividing 200 by 977, we get 0 with a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 200 leaves us with 200.
Grab the next digit (2) from the dividend, add it to 200, then carry on: 2002 / 977

Going ahead to step 4:
When dividing 2002 by 977, we get 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 1954 from 2002 and we're left with 48.
Include the next digit (0) from the dividend after 48, then repeat: 480 / 977

Advancing to step 5:
When dividing 480 by 977, we get 0 with a remainder of 480.
Write down 0 as next digit of the result. 
Result so far: 20.0
The remainder is 480 after subtracting 0 from 480.
Append the next digit (9) from the dividend to 480 and continue with: 4809 / 977

Let's proceed to step 6:
If we divide 4809 by 977, we get 4 and a remainder of 901.
Use 4 as the next digit of our solution. 
Result so far: 204.0
If we subtract 3908 from 4809, we get 901.
Bring next digit (1) of the dividend behind the 901 and repeat the process: 9011 / 977

Moving on to step 7:
977 goes into 9011 9 times with a remainder of 218.
The number 9 becomes the next digit in our result. 
Result so far: 2049.0
The remainder is 218 after subtracting 8793 from 9011.
Bring next digit (2) of the dividend behind the 218 and repeat the process: 2182 / 977

Advancing to step 8:
When dividing 2182 by 977, we get 2 with a remainder of 228.
Put 2 as the next digit of the answer. 
Result so far: 20492.0
If we take 1954 away from 2182, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 9:
If we divide 2280 by 977, we get 2 and a remainder of 326.
Write down 2 as next digit of the result. 
Result so far: 20492.2
The remainder is 326 after subtracting 1954 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Moving on to step 10:
977 can be fit into 3260 3 times, resulting in a remainder of 329.
Use 3 as the next digit of our solution. 
Result so far: 20492.23
If we take 2931 away from 3260, we end up with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

On to step 11:
977 goes into 3290 3 times with a remainder of 359.
Record the quotient 3 as the next digit in the result. 
Result so far: 20492.233
Subtracting 2931 from 3290 leaves us with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

After the division, we end up with 20492.233 and a remainder of 0.0359.