51521238 divided by 983 
The aim is to understand the frequency of 983 in 51521238.

On to step 1:
983 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 983

Step 2:
If we divide 51 by 983, we get 0 and a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Grab the next digit (5) from the dividend, add it to 51, then carry on: 515 / 983

Going ahead to step 3:
983 goes into 515 0 times with a remainder of 515.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 515 and we're left with 515.
Grab the next digit (2) from the dividend, add it to 515, then carry on: 5152 / 983

Step 4:
983 can be fit into 5152 5 times, resulting in a remainder of 237.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 4915 from 5152 and we're left with 237.
Bring next digit (1) of the dividend behind the 237 and repeat the process: 2371 / 983

Going ahead to step 5:
983 goes into 2371 2 times with a remainder of 405.
Write down 2 as next digit of the result. 
Result so far: 52.0
Subtract 1966 from 2371 to get 405.
Bring next digit (2) of the dividend behind the 405 and repeat the process: 4052 / 983

Step 6:
The number 983 fits into 4052 4 times, leaving a remainder of 120.
The next digit of our result is 4. 
Result so far: 524.0
If we subtract 3932 from 4052, we get 120.
Include the next digit (3) from the dividend after 120, then repeat: 1203 / 983

Let's proceed to step 7:
983 can be fit into 1203 1 times, resulting in a remainder of 220.
Use 1 as the next digit of our solution. 
Result so far: 5241.0
If we take 983 away from 1203, we end up with 220.
Take the next digit (8) from the dividend and append it to 220, then repeat: 2208 / 983

Moving on to step 8:
2208 divided by 983 is 2 with a remainder of 242.
Write down 2 as next digit of the result. 
Result so far: 52412.0
Deduct 1966 from 2208 and we're left with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Step 9:
The number 983 fits into 2420 2 times, leaving a remainder of 454.
The number 2 becomes the next digit in our result. 
Result so far: 52412.2
Deduct 1966 from 2420 and we're left with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Step 10:
If we divide 4540 by 983, we get 4 and a remainder of 608.
The next digit of our result is 4. 
Result so far: 52412.24
Deduct 3932 from 4540 and we're left with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Let's proceed to step 11:
6080 divided by 983 is 6 with a remainder of 182.
The next digit of our result is 6. 
Result so far: 52412.246
Subtract 5898 from 6080 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Going ahead to step 12:
983 goes into 1820 1 times with a remainder of 837.
The number 1 becomes the next digit in our result. 
Result so far: 52412.2461
If we take 983 away from 1820, we end up with 837.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8370, and continue the process.

On to step 13:
If we divide 8370 by 983, we get 8 and a remainder of 506.
Use 8 as the next digit of our solution. 
Result so far: 52412.24618
Subtracting 7864 from 8370 leaves us with 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

On to step 14:
When dividing 5060 by 983, we get 5 with a remainder of 145.
Put 5 as the next digit of the answer. 
Result so far: 52412.246185
Subtracting 4915 from 5060 leaves us with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 15:
1450 divided by 983 is 1 with a remainder of 467.
Put 1 as the next digit of the answer. 
Result so far: 52412.2461851
Subtract 983 from 1450 to get 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Advancing to step 16:
4670 divided by 983 is 4 with a remainder of 738.
The next digit of our result is 4. 
Result so far: 52412.24618514
Subtract 3932 from 4670 to get 738.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7380, and continue the process.

After the division, we end up with 52412.24618514 and a remainder of 7.38e-07.