99138087 divided by 651 
The aim is to understand the frequency of 651 in 99138087.

On to step 1:
651 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 651

Going ahead to step 2:
651 can be fit into 99 0 times, resulting in a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 99, we get 99.
Grab the next digit (1) from the dividend, add it to 99, then carry on: 991 / 651

Step 3:
If we divide 991 by 651, we get 1 and a remainder of 340.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 651 away from 991, we end up with 340.
Grab the next digit (3) from the dividend, add it to 340, then carry on: 3403 / 651

Moving on to step 4:
651 goes into 3403 5 times with a remainder of 148.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtract 3255 from 3403 to get 148.
Take the next digit (8) from the dividend and append it to 148, then repeat: 1488 / 651

Going ahead to step 5:
If we divide 1488 by 651, we get 2 and a remainder of 186.
Record the quotient 2 as the next digit in the result. 
Result so far: 152.0
Subtract 1302 from 1488 to get 186.
Include the next digit (0) from the dividend after 186, then repeat: 1860 / 651

Moving on to step 6:
651 can be fit into 1860 2 times, resulting in a remainder of 558.
Use 2 as the next digit of our solution. 
Result so far: 1522.0
If we take 1302 away from 1860, we end up with 558.
Take the next digit (8) from the dividend and append it to 558, then repeat: 5588 / 651

Advancing to step 7:
If we divide 5588 by 651, we get 8 and a remainder of 380.
Record the quotient 8 as the next digit in the result. 
Result so far: 15228.0
If we subtract 5208 from 5588, we get 380.
Append the next digit (7) from the dividend to 380 and continue with: 3807 / 651

Going ahead to step 8:
651 goes into 3807 5 times with a remainder of 552.
Put 5 as the next digit of the answer. 
Result so far: 152285.0
Subtract 3255 from 3807 to get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

On to step 9:
5520 divided by 651 is 8 with a remainder of 312.
Put 8 as the next digit of the answer. 
Result so far: 152285.8
Subtract 5208 from 5520 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Moving on to step 10:
When dividing 3120 by 651, we get 4 with a remainder of 516.
The number 4 becomes the next digit in our result. 
Result so far: 152285.84
Deduct 2604 from 3120 and we're left with 516.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5160, and continue the process.

Let's proceed to step 11:
5160 divided by 651 is 7 with a remainder of 603.
Record the quotient 7 as the next digit in the result. 
Result so far: 152285.847
Subtract 4557 from 5160 to get 603.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6030, and continue the process.

Step 12:
When dividing 6030 by 651, we get 9 with a remainder of 171.
The next digit of our result is 9. 
Result so far: 152285.8479
Subtracting 5859 from 6030 leaves us with 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Advancing to step 13:
The number 651 fits into 1710 2 times, leaving a remainder of 408.
Write down 2 as next digit of the result. 
Result so far: 152285.84792
Subtract 1302 from 1710 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Step 14:
651 can be fit into 4080 6 times, resulting in a remainder of 174.
Write down 6 as next digit of the result. 
Result so far: 152285.847926
Deduct 3906 from 4080 and we're left with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Going ahead to step 15:
651 goes into 1740 2 times with a remainder of 438.
Put 2 as the next digit of the answer. 
Result so far: 152285.8479262
If we subtract 1302 from 1740, we get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Advancing to step 16:
651 goes into 4380 6 times with a remainder of 474.
Use 6 as the next digit of our solution. 
Result so far: 152285.84792626
Subtract 3906 from 4380 to get 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

The quotient of the division is 152285.84792626, and the remainder is 4.74e-07.