We look at the division of 58118610 by 803 
The aim is to understand the frequency of 803 in 58118610.

Step 1:
803 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 803

On to step 2:
803 can be fit into 58 0 times, resulting in a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 58 leaves us with 58.
Append the next digit (1) from the dividend to 58 and continue with: 581 / 803

On to step 3:
The number 803 fits into 581 0 times, leaving a remainder of 581.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 581, we get 581.
Fetch the next digit (1) from the dividend, attach it to 581 and continue: 5811 / 803

Step 4:
The number 803 fits into 5811 7 times, leaving a remainder of 190.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 5621 from 5811 and we're left with 190.
Fetch the next digit (8) from the dividend, attach it to 190 and continue: 1908 / 803

Moving on to step 5:
If we divide 1908 by 803, we get 2 and a remainder of 302.
Use 2 as the next digit of our solution. 
Result so far: 72.0
If we subtract 1606 from 1908, we get 302.
Fetch the next digit (6) from the dividend, attach it to 302 and continue: 3026 / 803

Advancing to step 6:
803 can be fit into 3026 3 times, resulting in a remainder of 617.
The number 3 becomes the next digit in our result. 
Result so far: 723.0
If we take 2409 away from 3026, we end up with 617.
Append the next digit (1) from the dividend to 617 and continue with: 6171 / 803

Advancing to step 7:
6171 divided by 803 is 7 with a remainder of 550.
The next digit of our result is 7. 
Result so far: 7237.0
If we take 5621 away from 6171, we end up with 550.
Take the next digit (0) from the dividend and append it to 550, then repeat: 5500 / 803

Moving on to step 8:
When dividing 5500 by 803, we get 6 with a remainder of 682.
Use 6 as the next digit of our solution. 
Result so far: 72376.0
If we take 4818 away from 5500, we end up with 682.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

Step 9:
803 goes into 6820 8 times with a remainder of 396.
The next digit of our result is 8. 
Result so far: 72376.8
Subtracting 6424 from 6820 leaves us with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Step 10:
803 goes into 3960 4 times with a remainder of 748.
Put 4 as the next digit of the answer. 
Result so far: 72376.84
Deduct 3212 from 3960 and we're left with 748.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7480, and continue the process.

Let's proceed to step 11:
803 goes into 7480 9 times with a remainder of 253.
Write down 9 as next digit of the result. 
Result so far: 72376.849
The remainder is 253 after subtracting 7227 from 7480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Let's proceed to step 12:
If we divide 2530 by 803, we get 3 and a remainder of 121.
Record the quotient 3 as the next digit in the result. 
Result so far: 72376.8493
Subtract 2409 from 2530 to get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Let's proceed to step 13:
The number 803 fits into 1210 1 times, leaving a remainder of 407.
Record the quotient 1 as the next digit in the result. 
Result so far: 72376.84931
Deduct 803 from 1210 and we're left with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Let's proceed to step 14:
The number 803 fits into 4070 5 times, leaving a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 72376.849315
If we take 4015 away from 4070, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 15:
803 can be fit into 550 0 times, resulting in a remainder of 550.
The next digit of our result is 0. 
Result so far: 72376.849315
If we take 0 away from 550, we end up with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Going ahead to step 16:
When dividing 5500 by 803, we get 6 with a remainder of 682.
Write down 6 as next digit of the result. 
Result so far: 72376.84931506
If we subtract 4818 from 5500, we get 682.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

The final result is 72376.84931506 with a remainder of 6.82e-07.