Let's divide 12358621 by 751
The aim is to understand the frequency of 751 in 12358621.

Let's proceed to step 1:
The number 751 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 751

Going ahead to step 2:
751 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 751

Step 3:
751 goes into 123 0 times with a remainder of 123.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 123 to get 123.
Append the next digit (5) from the dividend to 123 and continue with: 1235 / 751

Moving on to step 4:
The number 751 fits into 1235 1 times, leaving a remainder of 484.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 751 from 1235 and we're left with 484.
Take the next digit (8) from the dividend and append it to 484, then repeat: 4848 / 751

Let's proceed to step 5:
When dividing 4848 by 751, we get 6 with a remainder of 342.
Use 6 as the next digit of our solution. 
Result so far: 16.0
The remainder is 342 after subtracting 4506 from 4848.
Append the next digit (6) from the dividend to 342 and continue with: 3426 / 751

Advancing to step 6:
If we divide 3426 by 751, we get 4 and a remainder of 422.
Put 4 as the next digit of the answer. 
Result so far: 164.0
If we subtract 3004 from 3426, we get 422.
Grab the next digit (2) from the dividend, add it to 422, then carry on: 4222 / 751

Moving on to step 7:
751 goes into 4222 5 times with a remainder of 467.
The next digit of our result is 5. 
Result so far: 1645.0
Deduct 3755 from 4222 and we're left with 467.
Include the next digit (1) from the dividend after 467, then repeat: 4671 / 751

Let's proceed to step 8:
When dividing 4671 by 751, we get 6 with a remainder of 165.
Use 6 as the next digit of our solution. 
Result so far: 16456.0
If we take 4506 away from 4671, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 9:
The number 751 fits into 1650 2 times, leaving a remainder of 148.
Write down 2 as next digit of the result. 
Result so far: 16456.2
The remainder is 148 after subtracting 1502 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Advancing to step 10:
1480 divided by 751 is 1 with a remainder of 729.
Write down 1 as next digit of the result. 
Result so far: 16456.21
The remainder is 729 after subtracting 751 from 1480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7290, and continue the process.

Moving on to step 11:
The number 751 fits into 7290 9 times, leaving a remainder of 531.
Use 9 as the next digit of our solution. 
Result so far: 16456.219
The remainder is 531 after subtracting 6759 from 7290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Moving on to step 12:
751 can be fit into 5310 7 times, resulting in a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 16456.2197
The remainder is 53 after subtracting 5257 from 5310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 13:
751 goes into 530 0 times with a remainder of 530.
Record the quotient 0 as the next digit in the result. 
Result so far: 16456.2197
Subtracting 0 from 530 leaves us with 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Moving on to step 14:
The number 751 fits into 5300 7 times, leaving a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 16456.219707
The remainder is 43 after subtracting 5257 from 5300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 15:
751 can be fit into 430 0 times, resulting in a remainder of 430.
The number 0 becomes the next digit in our result. 
Result so far: 16456.219707
Subtracting 0 from 430 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Advancing to step 16:
4300 divided by 751 is 5 with a remainder of 545.
The next digit of our result is 5. 
Result so far: 16456.21970705
Subtract 3755 from 4300 to get 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

The final result is 16456.21970705 with a remainder of 5.45e-07.