We look at the division of 99396519 by 142 
The aim is to understand the frequency of 142 in 99396519.

Going ahead to step 1:
When dividing 9 by 142, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 142

Going ahead to step 2:
99 divided by 142 is 0 with a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 99, we get 99.
Fetch the next digit (3) from the dividend, attach it to 99 and continue: 993 / 142

Moving on to step 3:
993 divided by 142 is 6 with a remainder of 141.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 852 from 993, we get 141.
Append the next digit (9) from the dividend to 141 and continue with: 1419 / 142

Going ahead to step 4:
If we divide 1419 by 142, we get 9 and a remainder of 141.
The next digit of our result is 9. 
Result so far: 69.0
If we take 1278 away from 1419, we end up with 141.
Include the next digit (6) from the dividend after 141, then repeat: 1416 / 142

Step 5:
142 can be fit into 1416 9 times, resulting in a remainder of 138.
Record the quotient 9 as the next digit in the result. 
Result so far: 699.0
If we take 1278 away from 1416, we end up with 138.
Append the next digit (5) from the dividend to 138 and continue with: 1385 / 142

Advancing to step 6:
142 can be fit into 1385 9 times, resulting in a remainder of 107.
The number 9 becomes the next digit in our result. 
Result so far: 6999.0
Deduct 1278 from 1385 and we're left with 107.
Include the next digit (1) from the dividend after 107, then repeat: 1071 / 142

Step 7:
1071 divided by 142 is 7 with a remainder of 77.
Use 7 as the next digit of our solution. 
Result so far: 69997.0
If we subtract 994 from 1071, we get 77.
Include the next digit (9) from the dividend after 77, then repeat: 779 / 142

On to step 8:
If we divide 779 by 142, we get 5 and a remainder of 69.
Use 5 as the next digit of our solution. 
Result so far: 699975.0
If we take 710 away from 779, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 9:
When dividing 690 by 142, we get 4 with a remainder of 122.
The next digit of our result is 4. 
Result so far: 699975.4
Subtract 568 from 690 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 10:
142 can be fit into 1220 8 times, resulting in a remainder of 84.
Use 8 as the next digit of our solution. 
Result so far: 699975.48
Subtract 1136 from 1220 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 11:
If we divide 840 by 142, we get 5 and a remainder of 130.
Put 5 as the next digit of the answer. 
Result so far: 699975.485
Subtracting 710 from 840 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 12:
The number 142 fits into 1300 9 times, leaving a remainder of 22.
The next digit of our result is 9. 
Result so far: 699975.4859
If we take 1278 away from 1300, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
The number 142 fits into 220 1 times, leaving a remainder of 78.
The number 1 becomes the next digit in our result. 
Result so far: 699975.48591
Subtract 142 from 220 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 14:
142 goes into 780 5 times with a remainder of 70.
The next digit of our result is 5. 
Result so far: 699975.485915
The remainder is 70 after subtracting 710 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 15:
142 can be fit into 700 4 times, resulting in a remainder of 132.
The number 4 becomes the next digit in our result. 
Result so far: 699975.4859154
If we subtract 568 from 700, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 16:
1320 divided by 142 is 9 with a remainder of 42.
The next digit of our result is 9. 
Result so far: 699975.48591549
Subtract 1278 from 1320 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

After the division, we end up with 699975.48591549 and a remainder of 4.2e-08.