9978574 ÷ 751 
The aim is to understand the frequency of 751 in 9978574.

Moving on to step 1:
751 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 751

Moving on to step 2:
99 divided by 751 is 0 with a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 99, we get 99.
Append the next digit (7) from the dividend to 99 and continue with: 997 / 751

Step 3:
751 goes into 997 1 times with a remainder of 246.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 246 after subtracting 751 from 997.
Include the next digit (8) from the dividend after 246, then repeat: 2468 / 751

Moving on to step 4:
If we divide 2468 by 751, we get 3 and a remainder of 215.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 2253 from 2468 to get 215.
Include the next digit (5) from the dividend after 215, then repeat: 2155 / 751

On to step 5:
751 can be fit into 2155 2 times, resulting in a remainder of 653.
Record the quotient 2 as the next digit in the result. 
Result so far: 132.0
The remainder is 653 after subtracting 1502 from 2155.
Bring next digit (7) of the dividend behind the 653 and repeat the process: 6537 / 751

Let's proceed to step 6:
751 goes into 6537 8 times with a remainder of 529.
Write down 8 as next digit of the result. 
Result so far: 1328.0
If we take 6008 away from 6537, we end up with 529.
Fetch the next digit (4) from the dividend, attach it to 529 and continue: 5294 / 751

Going ahead to step 7:
If we divide 5294 by 751, we get 7 and a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 13287.0
If we subtract 5257 from 5294, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 8:
When dividing 370 by 751, we get 0 with a remainder of 370.
The number 0 becomes the next digit in our result. 
Result so far: 13287.0
If we subtract 0 from 370, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 9:
The number 751 fits into 3700 4 times, leaving a remainder of 696.
Put 4 as the next digit of the answer. 
Result so far: 13287.04
Subtract 3004 from 3700 to get 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

Moving on to step 10:
The number 751 fits into 6960 9 times, leaving a remainder of 201.
The number 9 becomes the next digit in our result. 
Result so far: 13287.049
If we subtract 6759 from 6960, we get 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 11:
751 can be fit into 2010 2 times, resulting in a remainder of 508.
Put 2 as the next digit of the answer. 
Result so far: 13287.0492
The remainder is 508 after subtracting 1502 from 2010.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Advancing to step 12:
5080 divided by 751 is 6 with a remainder of 574.
Use 6 as the next digit of our solution. 
Result so far: 13287.04926
Subtracting 4506 from 5080 leaves us with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

On to step 13:
751 can be fit into 5740 7 times, resulting in a remainder of 483.
Write down 7 as next digit of the result. 
Result so far: 13287.049267
If we subtract 5257 from 5740, we get 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Going ahead to step 14:
The number 751 fits into 4830 6 times, leaving a remainder of 324.
Use 6 as the next digit of our solution. 
Result so far: 13287.0492676
Subtract 4506 from 4830 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Moving on to step 15:
751 can be fit into 3240 4 times, resulting in a remainder of 236.
The number 4 becomes the next digit in our result. 
Result so far: 13287.04926764
The remainder is 236 after subtracting 3004 from 3240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

The quotient of the division is 13287.04926764, and the remainder is 2.36e-07.