We look at the division of 53800398 by 758 
The aim is to understand the frequency of 758 in 53800398.

Going ahead to step 1:
The number 758 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 758

Going ahead to step 2:
758 goes into 53 0 times with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 758

On to step 3:
If we divide 538 by 758, we get 0 and a remainder of 538.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 538 and we're left with 538.
Include the next digit (0) from the dividend after 538, then repeat: 5380 / 758

Advancing to step 4:
The number 758 fits into 5380 7 times, leaving a remainder of 74.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 5306 away from 5380, we end up with 74.
Take the next digit (0) from the dividend and append it to 74, then repeat: 740 / 758

On to step 5:
740 divided by 758 is 0 with a remainder of 740.
Write down 0 as next digit of the result. 
Result so far: 70.0
Subtracting 0 from 740 leaves us with 740.
Include the next digit (3) from the dividend after 740, then repeat: 7403 / 758

Step 6:
758 can be fit into 7403 9 times, resulting in a remainder of 581.
Write down 9 as next digit of the result. 
Result so far: 709.0
Deduct 6822 from 7403 and we're left with 581.
Fetch the next digit (9) from the dividend, attach it to 581 and continue: 5819 / 758

On to step 7:
758 can be fit into 5819 7 times, resulting in a remainder of 513.
Use 7 as the next digit of our solution. 
Result so far: 7097.0
If we take 5306 away from 5819, we end up with 513.
Append the next digit (8) from the dividend to 513 and continue with: 5138 / 758

Going ahead to step 8:
758 goes into 5138 6 times with a remainder of 590.
Use 6 as the next digit of our solution. 
Result so far: 70976.0
Subtracting 4548 from 5138 leaves us with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Moving on to step 9:
If we divide 5900 by 758, we get 7 and a remainder of 594.
Put 7 as the next digit of the answer. 
Result so far: 70976.7
Subtracting 5306 from 5900 leaves us with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Step 10:
When dividing 5940 by 758, we get 7 with a remainder of 634.
Record the quotient 7 as the next digit in the result. 
Result so far: 70976.77
If we subtract 5306 from 5940, we get 634.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6340, and continue the process.

The quotient of the division is 70976.77, and the remainder is 0.634.